Alesis 24 manual

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Important Safety Instructions S TUDIO 24 R EFERENCE M ANUAL 5 I MPORTANT S AFETY I NSTRUCTIONS S AFETY SYMBOLS USED IN THIS PRODUCT This symbol alerts the user that there are important operating and maintenance instructions in the literature accompanying this unit. This symbol warns the user of uninsulated voltage within the unit that can cause dan[...]

Important Safety Instructions 6 S TUDIO 24 R EFERENCE M ANUAL 9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. When the provided [...]

Important Safety Instructions S TUDIO 24 R EFERENCE M ANUAL 7 I NSTRUCTIONS DE S ÉCURITÉ I MPORTANTES (F RENCH ) S YMBOLES UTILISÉS DANS CE PRODUIT Ce symbole alèrte l’utilisateur qu’il existe des instructions de fonctionnement et de maintenance dans la documentation jointe avec ce produit. Ce symbole avertit l’utilisateur de la présence[...]

Important Safety Instructions 8 S TUDIO 24 R EFERENCE M ANUAL 12. N’utilisez qu’avec un stand, ou table conçus pour l’utilisation d’audio professionnel ou instruments de musique. Dans toute installation, veillez de ne rien endommager à cause de câbles qui tirent sur des appareils et leur support. 13. Débranchez l’appareil lors d’un [...]

Important Safety Instructions S TUDIO 24 R EFERENCE M ANUAL 9 B EIM B ENUTZEN DIESES P RODUKTES BEACHTEN S IE BITTE DIE FOLGENDEN S ICHERHEITSHINWEISE : (G ERMAN ) 1. Lesen Sie die Hinweise. 2. Halten Sie sich an die Anleitung. 3. Beachten Sie alle Warnungen. 4. Beachten Sie alle Hinweise. 5. Bringen Sie das Gerät nie mit Wasser in Berührung. 6. [...]

Important Safety Instructions 1 0 S TUDIO 24 R EFERENCE M ANUAL CE D ECLARATION OF C ONFORMITY Manufacturer’s Name: Alesis Corporation Manufacturer’s Address: 1633 26th Street Santa Monica, CA 90404 USA declares, that the product: Product Name: Studio 24 Model Type: Analog Signal Processor conforms to the following Standards: EMC: EN 55022:1988[...]

Introduction S TUDIO 24 R EFERENCE M ANUAL 1 1 C HAPTER 1 I NTRODUCTION H OW TO USE THIS MANUAL You’ve taken the leap and purchased an Alesis Studio 24 Recording Console with Inline Monitor. Congratulations. At Alesis, we design equipment that’s used by everyone from first-time users to engineers with decades of experience. In either case, the [...]

Introduction 1 2 S TUDIO 24 R EFERENCE M ANUAL We appreciate your feedback. If you have any suggestions on how to improve this manual, please write to us at: Technical Communications Dept. Alesis Corp. 1633 26 th Street Santa Monica, CA 90404 or via email at: support@alesis.com C ONVENTIONS The buttons, knobs, and top and back panel connectors are [...]

Introduction S TUDIO 24 R EFERENCE M ANUAL 1 3 F OR THE EXPERIENCED : A QUICK OVERVIEW If you're already familiar with mixing consoles, here are some important points you need to know about the Alesis Studio 24 Recording Console. The Studio 24 follows commonly-accepted traditions for signal levels and routing. Channel Input Jacks: All 1/4” i[...]

Introduction 1 4 S TUDIO 24 R EFERENCE M ANUAL Think of them as an AUX 1/2 send with independent input source selection from the channel source, which can be submixed into the L/R if desired. EQ: The 75 Hz high-pass filter switch is independent of the EQ and may be used even if the EQ IN switch is out. The midrange controls are semi-parametric (fre[...]

Introduction S TUDIO 24 R EFERENCE M ANUAL 1 5 A BOUT THE S TUDIO 24 The Studio 24 is an extremely flexible, 12-channel, 24-input, 2-group plus L/R output, in-line monitor professional audio mixing console. Channels 1 - 8 are of the familiar design that include an XLR microphone input, balanced line input, trim control, equalization section, aux se[...]

Introduction 1 6 S TUDIO 24 R EFERENCE M ANUAL provides insert points on Channels 1 - 8, both Groups and the stereo main outputs, for use with compressors and graphic equalizers. Control room monitoring is made simpler by stereo-in-place Solo on each main channel. Either Auxiliary mix may be previewed in the control room while leaving the rest of t[...]

Introduction S TUDIO 24 R EFERENCE M ANUAL 1 7 B ASIC P RINCIPLES OF M IXING & M ULTITRACK R ECORDING Source select, level control, and destination assignment When it’s being used in a recording studio, the Studio 24’s job is to control the volume, tone, pan and effects for many different inputs such as microphones, electronic instruments a[...]

Introduction 1 8 S TUDIO 24 R EFERENCE M ANUAL T HE STAGES OF MULTITRACK RECORDING Most multitrack recording is a three-stage process. Instead of recording an entire musical group in a single take of a live performance, recordings are usually made a part at a time and built up in layers. Recording one or two instruments at a time makes it easier to[...]

Introduction S TUDIO 24 R EFERENCE M ANUAL 1 9 EQ PCH DLY RVB 1 L M R EQ PCH DLY RVB L M R EQ PCH DLY RVB L M R EQ PCH DLY RVB L M R EQ PCH DLY RVB L M R EQ PCH DLY RVB L M R EQ PCH DLY RVB L M R EQ PCH DLY RVB L M R 2 3 4 5 6 7 8 L R IN L R OUT PRESET PAGE 16 MIDI DIG.IN EDITED 27 38 49 5 A UX Sends[...]

Introduction 2 0 S TUDIO 24 R EFERENCE M ANUAL T HE DIFFERENT MIXES AND WHAT THEY ’ RE NEEDED FOR Now that you understand the different sources and different destinations used during the three stages of the multitrack recording process, let’s look at each one individually, without the other components getting in the way. Please note that these [...]

Introduction S TUDIO 24 R EFERENCE M ANUAL 2 1 MUTE PA N F ADER DIRECT OUT GRP 1/2 L/R (to MON 1/2) GROUP OUTPUTS (combined with signals from other channels) (to A UX sends) TRIM LINE IN MIC IN T APE IN CHAN/MON REVERSE 75 Hz HIGH MID FREQ LO W INSER T jack MAIN L/R OUTS & INSER TS 1 L/R 2 Multitrac k Recor der Mix (Gr oups, Directs and L/R) (f[...]

Introduction 2 2 S TUDIO 24 R EFERENCE M ANUAL M ONITOR (C ONTROL R OOM ) M IX This mix is what the engineer and/or performer hears in headphones or the control room speakers. During overdubbing, this mix is typically controlled by the Studio 24’s MONITOR 1/2 section, and sometimes by the L/R mix. In the monitor mix, the goal is to set the contro[...]

Introduction S TUDIO 24 R EFERENCE M ANUAL 2 3 Monitor/Contr ol Room/Solo System MONIT OR P AN TRIM LINE IN T APE IN MIC IN CHAN/MON REVERSE MON 1/2 LEVEL MONIT OR 1/2 MASTER SOLO Channel F ader Channel P AN (SIP) SOLO MASTER MASTER SOLO LED CONTROL ROOM SELECT SWITCHES CONTROL ROOM LEVEL Any SOLO on console controls this relay electronically CONTR[...]

Introduction 2 4 S TUDIO 24 R EFERENCE M ANUAL A UX S ENDS AND R ETURNS : E FFECTS The last important mix is usually used for adding effects (such as reverb, delay, chorus, etc.) to the mix. This may be part of the tracking and overdubbing stage, and is almost always part of the mixdown stage. The rows of blue knobs running across the center of the[...]

Guided Tour S TUDIO 24 R EFERENCE M ANUAL 2 5 C HAPTER 2: G UIDED T OUR R ECORDER M IX /M ONITOR M IX S YSTEM The Studio 24 is designed to accommodate the two-way signal flow required in a recording console. The recorder and monitor mix systems are where signals are mixed, EQ’d and routed to the Aux sends, Groups and Left and Right Master outs. C[...]

Guided Tour 2 6 S TUDIO 24 R EFERENCE M ANUAL — and two paths that the audio signal can take: the main channel and the monitor outputs. This is a key concept to understand: the basic principle is that there are three sources of audio and two ways it can go. There are variations on this concept that will be covered later in the manual, but all of [...]

Guided Tour S TUDIO 24 R EFERENCE M ANUAL 2 7 The Mid EQ has two knobs: one to set the amount of boost or cut and one to select the frequency you want to control (adjustable from 120 Hz to 13 kHz). To avoid low-end rumble and noise, turn on the 75 Hz high-pass filter, which removes frequencies below 75 Hz at a rate of 18 dB per octave. The 75 HZ sw[...]

Guided Tour 2 8 S TUDIO 24 R EFERENCE M ANUAL M ONITOR 1/2 SECTION In multitrack recording, once signal goes from the Group Outputs to the recorder, it comes back to the tape inputs. The TAPE IN jack has no trim control of its own; it is designed to handle the unbalanced line levels that most multitrack recorders generate. Each Channel 1 - 8 featur[...]

Guided Tour S TUDIO 24 R EFERENCE M ANUAL 2 9 A UX S END /R ETURN S YSTEM A UX SENDS In the center of each channel module are the blue knobs that make up the Auxiliary Send section, which allows the signal to be routed to outboard signal processing equipment. There are two Aux knobs in each channel labeled “3” and “4” that set the level of [...]

Guided Tour 3 0 S TUDIO 24 R EFERENCE M ANUAL C ONTROL R OOM S YSTEM The SOLO switches in each channel, along with the Control Room switches and Headphone section, make up the Control Room system of the Studio 24. This is the engineer’s mix. It allows you to audition the different mixes that are going on at any given time and to hear individual i[...]

Guided Tour S TUDIO 24 R EFERENCE M ANUAL 3 1 S OLO Regardless of what’s chosen as the control room source, if any of the 14 SOLO buttons are pressed anywhere on the console, the solo mix automatically becomes the control room source. Because there are so many solo buttons, we make it easy for you to find the one on the Channel that’s “taken [...]

Guided Tour 3 2 S TUDIO 24 R EFERENCE M ANUAL[...]

Hooking It Up S TUDIO 24 R EFERENCE M ANUAL 3 3 C HAPTER 3: H OOKING I T U P U NPACKING AND I NSPECTION Your Studio 24 was packed carefully at the factory, and the box was designed to protect the unit during shipping. Please retain this box in the highly unlikely event that you need to return the Studio 24 for servicing. Upon receiving the Studio 2[...]

Hooking It Up 3 4 S TUDIO 24 R EFERENCE M ANUAL P OWER Make sure you read the initial Important Safety Instructions chapter at the front of this manual. The Studio 24 works with a single standard line voltage and comes with a detachable AC line cord suitable for the destination to which the mixing console is shipped. Units sold in the United States[...]

Hooking It Up S TUDIO 24 R EFERENCE M ANUAL 3 5 A VOIDING GROUND LOOP NOISE In today’s studio, where it seems every piece of equipment has its own computer chip inside, there are many opportunities for ground loop problems to occur. These show up as hums, buzzes or sometimes radio reception and can occur if a piece of equipment “sees” two or [...]

Hooking It Up 3 6 S TUDIO 24 R EFERENCE M ANUAL C HANNEL I NPUTS AND O UTPUTS Each of the first 8 channel modules on the Studio 24 contains an XLR balanced MIC IN connector, a 1/4" TRS balanced LINE IN jack, an RCA unbalanced RCA TAPE IN jack, an unbalanced RCA DIRECT OUT jack and a 1/4" TRS INSERT jack. Each of the stereo Channels 9 - 16[...]

Hooking It Up S TUDIO 24 R EFERENCE M ANUAL 3 7 L INE I NPUTS The LINE IN of each channel is a 1/4" jack which will accept balanced or unbalanced line-level sources. “Line level” means that signals are typically in the 1/3 of a volt to 2-volt range, such as the output of synthesizers, keyboards, CD players, etc. This is in contrast to the [...]

Hooking It Up 3 8 S TUDIO 24 R EFERENCE M ANUAL D IRECT O UTPUTS The DIRECT OUT jack on each channel is an unbalanced RCA connector which provides a direct output of the post-fader channel signal. If you want to record a single source to a track of tape, connect this to the inputs of your multitrack tape recorder, or for any other application where[...]

Hooking It Up S TUDIO 24 R EFERENCE M ANUAL 3 9 M ASTER I NPUTS AND O UTPUTS Top panel : at the upper right-hand corner of the top panel of the Studio 24 you’ll find most of the connectors that provide the outputs of the console: two 1/4” MAIN OUTs (plus two MAIN INSERT jacks), and two 1/4" GROUP OUT connectors (plus two GROUP INSERT jacks[...]

Hooking It Up 4 0 S TUDIO 24 R EFERENCE M ANUAL G ROUP I NSERTS These are identical to the Main Insert jacks described above. They are used to insert a outboard stereo effects device (such as a compressor, limiter, reverb or EQ) directly into the Group signal path, before the fader. A special Y-cable (stereo 1/4" plug to two mono 1/4" plu[...]

Hooking It Up S TUDIO 24 R EFERENCE M ANUAL 4 1 Headphones Tip Sleev e LEFT Signal Ground Tip Sleev e Ring Ring RIGHT Signal C HART OF C ONNECTIONS The Studio 24 may be easily interfaced with most other professional recording and audio equipment. Most inputs and outputs use 1/4" jacks (and may be used with balanced or unbalanced circuits) and [...]

Hooking It Up 4 2 S TUDIO 24 R EFERENCE M ANUAL C ONNECTING TO AN U NBALANCED -10 D BV M ULTITRACK R ECORDER Interfacing the Studio 24 with a typical multitrack recorder using semiprofessional unbalanced phono or 1/4" phone jacks is a simple process. The Studio 24 is not designed to be used with the balanced inputs and outputs of the ELCO-type[...]

Hooking It Up S TUDIO 24 R EFERENCE M ANUAL 4 3 C ONNECTING TO A 2-T RACK M IXDOWN D ECK The mixdown deck is where everything comes together: the final mix. This is your stereo master recording of the finished project (or a rough mix of a work in progress). A special pair of inputs of the Studio 24 are provided to hear the mixdown deck in the Contr[...]

Hooking It Up 4 4 S TUDIO 24 R EFERENCE M ANUAL C ONNECTING TO A C ONTROL R OOM AMPLIFIER Connect the Studio 24’s CONTROL ROOM OUTS to the inputs of the amplifier used for the control room monitor speakers. The CONTROL ROOM LEVEL knob on the Studio 24 controls the level of the control room monitor speakers. Note: These jacks are also TRS balanced[...]

Effects and Signal Processing S TUDIO 24 R EFERENCE M ANUAL 4 5 C HAPTER 4: E FFECTS AND S IGNAL P ROCESSING C ONNECTING A UX S ENDS AND R ETURNS TO O UTBOARD E FFECTS Aux Sends 3 and 4 (labeled AUX 3/4 on the mixer) are derived post-fader, which means that any changes in level in the fader will also change the Aux levels as well. The Auxiliaries a[...]

Effects and Signal Processing 4 6 S TUDIO 24 R EFERENCE M ANUAL Left/Right Outputs Left Input Dry Defeat = ON S HOULD YOU USE ONE OR TWO INPUTS TO EFFECTS ? If your effect unit has two inputs, in most cases you only need to connect from ONE Aux Send to the LEFT (mono) INPUT of the effect unit, but you will still connect both the LEFT and RIGHT OUTP[...]

Effects and Signal Processing S TUDIO 24 R EFERENCE M ANUAL 4 7 Channels 1 - 8. Effects returned to a stereo Channel can be SOLOed, MUTEd, sent to the Groups and routed to L/R. Also, you have the ability to change the EQ of the effect’s signal, route it to MON 1/2, and send it out AUX 3 or AUX 4. But be careful when you send an effect returned to[...]

Effects and Signal Processing 4 8 S TUDIO 24 R EFERENCE M ANUAL too loud even at low settings of the Stereo Aux Return LEVEL controls. To hear effects in the control room monitors: It’s possible to put effects into the Control Room or headphone mix without recording them to the multitrack. 1 Press the L/R switch of the Stereo Aux Return. Make sur[...]

Effects and Signal Processing S TUDIO 24 R EFERENCE M ANUAL 4 9 C ONNECTING S IGNAL P ROCESSORS TO I NSERT J ACKS Inserts are used to connect signal processing devices directly into the signal path of a Channel, the Group outputs and the Main outputs. Normally, the device connected would be one that shapes the dynamics or tone of a signal (such as [...]

Effects and Signal Processing 5 0 S TUDIO 24 R EFERENCE M ANUAL[...]

Recording S TUDIO 24 R EFERENCE M ANUAL 5 1 C HAPTER 5: M ULTITRACK R ECORDING A PPLICATIONS R ECORDING S ETTING L EVELS To get the maximum performance from your mixer, you must set all audio levels to get the least amount of background noise (hiss or hum) while not distorting (overloading) the electronics. To do this, it’s important to set prope[...]

Recording 5 2 S TUDIO 24 R EFERENCE M ANUAL The Studio 24 has been designed with plenty of headroom on the internal summing amplifiers (23 dB of headroom above a +4 dBu balanced output level). It is only possible to clip the mixer internally if several channels are at or near their maximum clipping point (with PEAK indicators flashing) and then sen[...]

Recording S TUDIO 24 R EFERENCE M ANUAL 5 3 H OW TO R ECORD A S INGLE S OURCE TO O NE T RACK When recording a single source appearing on one Channel onto a single tape track, it is usually best to use the DIRECT OUT of the Channel. This provides the most direct connection between the Studio 24 Mixer and the multitrack. To record a single source to [...]

Recording 5 4 S TUDIO 24 R EFERENCE M ANUAL R ECORDING M ULTIPLE S OURCES TO O NE T RACK When more than one Channel is to be recorded onto the same track of a multitrack recorder, it is necessary to assign all desired Channels to a Group, and connect the Group Output to the input of the multitrack using the DIRECT OUT SOURCE feature of the Studio 2[...]

Recording S TUDIO 24 R EFERENCE M ANUAL 5 5 Tip : Note that the overall level of Channels panned left is controlled by the GRP 1 FADER; the overall level of Channels panned right is controlled by the GRP 2 FADER. So if you’re not getting signal from one or more Channels, check their PAN knobs. In this example, Channels 1, 2 and 3 must be panned h[...]

Recording 5 6 S TUDIO 24 R EFERENCE M ANUAL machine tracks you wish to record on into the record-ready or “input” mode, and raise the MON 1/2 LEVEL control knobs of the Channels the tracks’ outputs are connected to. Set the CONTROL ROOM SOURCE switch to MON 1/2 (all other CONTROL ROOM switches must be up). Set the Monitor PAN controls to hard[...]

Recording S TUDIO 24 R EFERENCE M ANUAL 5 7 R ECORDING T IPS For the cleanest possible recording, the Group FADERS (or Channel FADERS if the DIRECT OUTS are being used) should be adjusted so that the level going to tape averages 0 VU on the meters of a typical analog multitrack tape machine, or peaks just below MAX or 0 dBFS on a digital multitrack[...]

Recording 5 8 S TUDIO 24 R EFERENCE M ANUAL O VERDUBBING U SING MONITOR 1/2 TO M ONITOR THE M ULTITRACK Once you have recorded onto the multitrack tape machine, you’ll need to hear the playback of those tracks, as you record new tracks in sync with the material already on tape (see next section, Getting the Mix to Headphones ). The signals coming[...]

Recording S TUDIO 24 R EFERENCE M ANUAL 5 9 U SING THE C HANNEL F ADERS TO M ONITOR THE M ULTITRACK If you’re only recording a few inputs at a time, you may want to use a different technique for monitoring. Instead of monitoring the multitrack through MON 1/2, you might prefer listening to recorded tracks through the Channels where you can use th[...]

Recording 6 0 S TUDIO 24 R EFERENCE M ANUAL T ape Returns[...]

Recording S TUDIO 24 R EFERENCE M ANUAL 6 1 G ETTING THE M IX TO THE H EADPHONES Once you have the tape tracks returning to the mixer, it is simple to create a cue mix for the musicians to listen to over headphones while overdubbing. The cue mix is created using MONITOR 1/2 on the Studio 24, because it is a pre-fader mix that is independent from al[...]

Recording 6 2 S TUDIO 24 R EFERENCE M ANUAL M ONITORING MIDI V IRTUAL T RACKS If you are using a MIDI sequencer, the tracks being played “live” from synthesizers, sound modules and drum machines in synchronization with the tape are effectively the same as additional tracks on tape –– which is why they are called “virtual tracks.” Stereo[...]

Recording S TUDIO 24 R EFERENCE M ANUAL 6 3 B OUNCING T RACKS Sometimes it is necessary to combine several tracks onto another track, particularly when you are running out of tape tracks. Example: Once you’ve recorded the vocal harmonies on four different tracks, you could bounce them all over to one track, or two tracks for a stereo mix, thereby[...]

Recording 6 4 S TUDIO 24 R EFERENCE M ANUAL To bounce multiple tracks to two tracks (stereo): 1 For each Channel (tape track) you wish to bounce, press the CHAN/MON REVERSE button so it is down. This sends the tape tracks to the Channel FADERS. Make sure that CHAN/MON REVERSE is UP on the Channels you’re bouncing to (Channels 5 and 6 in this exam[...]

Recording S TUDIO 24 R EFERENCE M ANUAL 6 5 P LAYBACK /M IXDOWN G ETTING THE M IX TO THE 2-T RACK D ECK Once you have recorded your tracks and overdubs, you’re ready for the last stage of multitrack recording: the mixdown to stereo. This involves connecting the L/R MAIN OUT jacks to the left and right inputs of a cassette deck, DAT deck, CD recor[...]

Recording 6 6 S TUDIO 24 R EFERENCE M ANUAL G UIDELINES FOR A ROUGH MIX Creating a mix is easy; creating a great mix (one that jumps off the tape and hits you right in the face) is a lot harder. There are those engineers who are in demand just for mixing because of their sense of balance between instruments causes the mix to come alive with excitem[...]

Recording S TUDIO 24 R EFERENCE M ANUAL 6 7 instruments so that the LED meters read “-12.” 13 Unmute all Channels and make balance adjustments as necessary. The above process can be accomplished very quickly once you get the hang of it. Usually, it is done at least twice when “getting up” a mix. The first time is without effects or EQ to se[...]

Recording 6 8 S TUDIO 24 R EFERENCE M ANUAL[...]

Sound Reinforcement S TUDIO 24 R EFERENCE M ANUAL 6 9 C HAPTER 6: S OUND R EINFORCEMENT A PPLICATIONS Though the Studio 24 has been designed as a recording console, it makes an excellent console for live PA applications. It has just as much (if not more) headroom as a PA console, is more flexible, and has a much more powerful EQ than the typical st[...]

Sound Reinforcement 7 0 S TUDIO 24 R EFERENCE M ANUAL To control a stereo submix of all the vocal mics from the Group 1 and 2 faders: If you are doing a stereo mix, you may use two groups for a submix. Follow the instructions above, but pan the microphones anywhere from left to right during step 4. Make sure Group Faders 1 and 2 are both set to the[...]

Sound Reinforcement S TUDIO 24 R EFERENCE M ANUAL 7 1 4 Route the MONITOR OUTS L and R jacks to the input of a stereo power amplifier. Usually, a 1/3 octave graphic equalizer is patched into the line to notch out feedback frequencies. The Alesis M-EQ 230 is a perfect unit for this application. 5 Route the two speaker outputs of the amplifier to two[...]

Sound Reinforcement 7 2 S TUDIO 24 R EFERENCE M ANUAL being fed by the same microphones, a whole set of possibilities open up. U SING M ONITOR 1/2 TO FEED A CASSETTE DECK Since the Studio 24 has a true stereo mixer independent of the main console, it can be used to create a stereo reference mix of a live concert, while the main faders set the PA mi[...]

Sound Reinforcement S TUDIO 24 R EFERENCE M ANUAL 7 3 U SING M ONITOR 1/2 AS THE PA MIX DURING MULTITRACK RECORDING You may run into some situations where you need the opposite hookup from the above, especially with acoustic jazz or folk recordings where a minimum of PA or monitoring is needed, but the recording must be digitally pristine. For exam[...]

Sound Reinforcement 7 4 S TUDIO 24 R EFERENCE M ANUAL V IDEO P RODUCTION AND P OST -P RODUCTION The Studio 24 lends itself extremely well to post-production applications where a soundtrack is being developed for video or film. In most situations, a synchronization system is being used, which ties together all of the time-based equipment including o[...]

Description of Controls S TUDIO 24 R EFERENCE M ANUAL 7 5 C HAPTER 7: D ESCRIPTION OF C ONTROLS C HANNEL I NPUT C ONTROLS T RIM The TRIM knob adjusts the sensitivity of both the Mic and Line inputs. Proper setting of this control is essential for low-noise, distortion-free operation. In most cases, microphones require from 30 to 60 dB of preamplifi[...]

Description of Controls 7 6 S TUDIO 24 R EFERENCE M ANUAL DIRECT OUT SOURCE SWITCH On many mixing consoles, the concept of a Direct Out signal path is simple: whatever signal is input to a Channel is sent back to its own direct out jack. On the Studio 24, that’s exactly what happens when this switch is in its up position. If a microphone or instr[...]

Description of Controls S TUDIO 24 R EFERENCE M ANUAL 7 7 HIGH AND LOW These are standard shelving “treble and bass” tone controls. The HIGH knob range is +/- 15 dB at a fixed frequency of 12 kHz. This means that frequencies above 12 kHz will be boosted or cut by the same amount , and frequency response between 1 kHz and 12 kHz will gradually r[...]

Description of Controls 7 8 S TUDIO 24 R EFERENCE M ANUAL MID EQ CONTROLS : LEVEL AND FREQ For Channels 1 - 8, the Studio 24 features a “semi-parametric midrange”, which means that you can control some of the parameters or aspects of the midrange, besides just cutting and boosting a predetermined frequency range. Combined with the HIGH and LOW [...]

Description of Controls S TUDIO 24 R EFERENCE M ANUAL 7 9 A UXILIARY S END S ECTION AUX 3 AND AUX 4 S ENDS These blue knobs are both mono post-fader sends typically used for effect sends whose source is always the Channel FADER. The upper AUX 3 knob controls how much signal will be sent to AUX SEND 3. The AUX 4 knob controls how much signal will be[...]

Description of Controls 8 0 S TUDIO 24 R EFERENCE M ANUAL of a mono signal to the MON 1/2 MASTER, the BAL (balance) control sets the left/right blend of a stereo signal (instruments plugged into both the L and R inputs) to the MON 1/2 MASTER. If you have an instrument plugged into the Left input only, it is routed as a mono signal, and the BAL knob[...]

Description of Controls S TUDIO 24 R EFERENCE M ANUAL 8 1 -20 D B (S IGNAL P RESENT ) LED The green “-20” LED will light whenever a signal of -20 dB or higher is present anywhere in the channel circuit. This will help you determine what instruments are on what Channels, and if the TRIM controls are set properly. The “-20” LED has a second f[...]

Description of Controls 8 2 S TUDIO 24 R EFERENCE M ANUAL C HANNEL F ADER This linear 60 mm slide fader varies the level feeding the Channel PAN control and Assignment switches (L/R and GRP) and AUX 3/4.. The fader is set for unity gain (level in = level out) when it is set at the “0 dB” mark, 2/3 of the way up. When the fader is raised to its [...]

Description of Controls S TUDIO 24 R EFERENCE M ANUAL 8 3 H EADPHONE L EVEL The LEVEL knob sets the overall level of the headphone output jack. The Headphones get the same signal appearing at the Control Room outputs (but independent of the Control Room’s level control). H EADPHONE JACK The headphone jack on the top panel is designed for most ste[...]

Description of Controls 8 4 S TUDIO 24 R EFERENCE M ANUAL MONITOR OUTS 1 and 2 jacks on the back panel. The LINK switch simply mixes or assigns the 12x2 monitor mix to the L/R mix buss as well. If you are sending the Monitor signal to the headphones or control room, but don’t want that signal on the Master L/R stereo output, leave the LINK TO L/R[...]

Description of Controls S TUDIO 24 R EFERENCE M ANUAL 8 5 C ONTROL R OOM /S OLO S ECTION The Control Room section determines what you’ll hear in the control room and see on the meters. The Control Room section does not affect any other mix of the Studio 24–it just eavesdrops on them. The Solo controls are a special part of the Control Room mix,[...]

Description of Controls 8 6 S TUDIO 24 R EFERENCE M ANUAL M ETERS The L and R meters will display whatever is selected as the Control Room source, including SOLO. When SOLO is on, the meters show you the post-fader level of an individual Channel. These are peak-type meters which respond to the immediate level. When the meters read “0” (top gree[...]

Description of Controls S TUDIO 24 R EFERENCE M ANUAL 8 7 drum Channels’ L/R switches off, assign them to Group 1/2, and press Group 1/2’s TO L/R switch. The Group 1/2 faders are now a submaster for the entire drum mix in the left/right stereo mix feeding the PA or mixdown deck. MONO SWITCH Sometimes you may need two separate subgroups, instead[...]

Description of Controls 8 8 S TUDIO 24 R EFERENCE M ANUAL T OP P ANEL I NPUTS AND O UTPUTS M AIN O UTS Connect these jacks to your primary destination: the PA system’s inputs, or the 2- track mixdown recorder. Signal comes here from the L/R MASTER FADER, and passes through the Main Inserts. This output is a true, 3-wire balanced differential outp[...]

Description of Controls S TUDIO 24 R EFERENCE M ANUAL 8 9 B ACK PANEL POWER SWITCH This is the master power switch for the Studio 24. When it’s ON, the green LED on the front panel will light. P OWER CABLE An industry-standard removable power cable is shipped with your Studio 24. If you lose it, or need a longer or shorter length, compatible cabl[...]

Description of Controls 9 0 S TUDIO 24 R EFERENCE M ANUAL 2 T RACK T APE I N Connect the output of your 2-track (cassette, DAT, CD, reel-to-reel, etc.) to these jacks. Any stereo source connected here may be heard in the control room mix only. The RCA jacks accept an unbalanced signal only; you may need to make or purchase cables that have RCAs on [...]

Description of Controls S TUDIO 24 R EFERENCE M ANUAL 9 1 C HANNEL I NPUT /O UTPUT J ACKS (8) D IRECT O UT This jack provides the output of the channel, post-fader. Connect it to the input of a multitrack tape recorder if you need to record more than two tracks at a time, or if you need only one microphone or line-level instrument per track. These [...]

Description of Controls 9 2 S TUDIO 24 R EFERENCE M ANUAL L INE I N JACKS (S TEREO C HANNELS ) Similar to the LINE IN jacks on Channels 1 - 8, these input jacks may be used with balanced 1/4” TRS or unbalanced 1/4” sources. Each of the stereo Channels 9 - 12 have two 1/4” TRS balanced LINE IN jacks per Channel, designed to accept line-level s[...]

Troubleshooting S TUDIO 24 R EFERENCE M ANUAL 9 3 C HAPTER 8: T ROUBLESHOOTING T ROUBLESHOOTING I NDEX If you are experience problems while operating the Studio 24, please use the following table to locate possible causes and solutions before contacting Alesis customer service for assistance. Symptom Cause Solution The POWER LED does not light when[...]

Troubleshooting 9 4 S TUDIO 24 R EFERENCE M ANUAL M AINTENANCE /S ERVICE C LEANING AND M AINTENANCE Disconnect the AC cord, then use a damp cloth to clean the console’s metal and plastic surfaces. For heavy dirt, use a non-abrasive household cleaner such as Formula 409® or Fantastik®. DO NOT SPRAY THE CLEANER DIRECTLY ONTO THE FRONT OF THE UNIT[...]

Troubleshooting S TUDIO 24 R EFERENCE M ANUAL 9 5 R EFER A LL S ERVICING TO A LESIS We believe that the Studio 24 is one of the most reliable mixing consoles that can be made using current technology, and should provide years of trouble-free use. However, should problems occur, DO NOT attempt to service the unit yourself. Service on this product sh[...]

Troubleshooting 9 6 S TUDIO 24 R EFERENCE M ANUAL[...]

Specifications S TUDIO 24 R EFERENCE M ANUAL 9 7 S PECIFICATIONS All measurements taken with an Audio Precision System One. All noise measurements taken with trim at minimum and faders at unity gain with 22 Hz to 22 kHz bandwidth unless otherwise specified. Main In & Out measurements made on balanced +4 dBu connectors. (+4 dBu into a line input[...]

Specifications 9 8 S TUDIO 24 R EFERENCE M ANUAL MAXIMUM GAIN +76 dB, MIC IN to L/R outputs, balanced +70 dB unbalanced +72 dB MIC IN to MON 1/2 OUT +82 dB MIC IN to AUX 3-4 OUT +85 dB, MIC IN to MONITOR OUT, balanced. CHANNEL PEAK LED ON: 6 dB below channel clipping METER: Peak type -24 dB to PK (+18 dB over reference at L/R OUT, 5 dB before outpu[...]

Specifications S TUDIO 24 R EFERENCE M ANUAL 9 9 Top Panel: Mic Inputs XLR (8) Balanced Line Inputs 1/4" TRS (16) Channel Inserts 1/4" TRS (8) Aux Sends 1/4" TRS (2) Stereo Aux Returns 1/4" mono (4) Headphone Jack (1) 1/4" TRS Main and Group Inserts 1/4" TRS (4) Group Outs 1/4" TRS (2) L/R Main Outputs (balanced) [...]

Specifications 1 0 0 S TUDIO 24 R EFERENCE M ANUAL D IMENSIONAL D RAWINGS :[...]

Specifications S TUDIO 24 R EFERENCE M ANUAL 1 0 1 G AIN D IAGRAM +3 0 +2 0 +1 0 0 -10 -20 -30 -40 -50 -60 -70 -62 d B u M I C in pu t -12 d B u M I C in pu t -10 d B V T A P E i n p u t - 2 dBu unbalanced + 8 dBu LINE i nput M ax . line in p u t + 32 dB u - 4 2 dBu LI NE input H i /m i d /l o w + / - 15 d B Chan. fade r Ma s t e r fade r Ph o n e [...]

Specifications 1 0 2 S TUDIO 24 R EFERENCE M ANUAL B LOCK D IAGRAM[...]

Index S TUDIO 24 R EFERENCE M ANUAL 1 0 3 I NDEX 2 TRACK, 18, 40, 85 connecting, 43 -20 dB (Signal Present) LED, 81 75 Hz, 27, 76 ADAT, 39 normalling w. Groups, 63 assignment, 17, 27, 45 Aux Return, 29 LEVEL, 82 Aux Send/Return, 29 Aux Sends, 24, 29, 45 as cue mix, 22 connecting, 45 balanced, 37, 41 Block Diagram, 102 Bouncing Tracks, 63 Connection[...]

Index 1 0 4 S TUDIO 24 R EFERENCE M ANUAL Group, 87 overdubbing, 18, 58, 61 Overload, 80 PA systems, 69 Pan Channel, 80 Monitor, 22, 79 parametric EQ, 26 Patchbay, 44 PEAK, 13 as MUTE indicator, 80 Channel, 80 PHANTOM, 82, 92 PK, 13 in L/R meter, 86 post-fader, 45 Power, 34 Power cable, 6, 89 recording, 17, 51, 53 Returns see STEREO AUX RETURNS, 82[...]