Alesis 12, 16 User Manual

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Firewire Recording 5

7.You will do most of your monitoring through the mixer. However, if you want to monitor with Cubase’s effects, or if you just want to hear what the computer is hearing, press the direct monitoring button next to the Record Enable button.

Note that using direct monitoring causes a small delay as the digital audio is being processed. For this reason, when you use direct monitoring, you may want to press the MultiMix’s MIX TO CONTROL ROOM button up so as not to hear the audio signal twice.

8.Add additional audio tracks as needed. Record-armeach one and press the RECORD button to begin recording.

For additional information, consult your software’s documentation.

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5 Firewire Recording

Working with the ASIO control panel

Accessing the ASIO control panel

From within Cubase, select “Devices” | “Device Setup….” | “VST MultiTrack.” Then, click the “Control Panel” button to access the MultiMix’s ASIO control panel.

Setting the mixer nickname

You can change the name of the mixer as it’s seen by the recording program. Once this is done, choose “Reset All” in Cubase (or the equivalent command in other programs) to make the change to the mixer down flow down to the names of the input and output channels.

Setting the master device

If multiple audio devices are connected, one must be designated as the clock master.

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Firewire Recording 5

Adjusting latency by changing the buffer

size

“Latency” refers to the amount of time it takes for audio to get into and out of the computer. In the best of all possible worlds, there would be no such thing as latency—wewould hear audio the moment it was created. However, computers have limited processing power, and they can“choke”—cuttingoff recording or crashingprograms—ifthey are asked to handle too much data all at once.

To minimize this risk, audio can be stored in a buffer for a certain amount of time. This buffering helps smooth out the stream of data that the computer needs to handle. In the end, all of the audio is sorted out and played correctly, but with a delay.

Here are the basic considerations to consider when adjusting buffer sizes:

Lower buffer size = less latency but higher risk of audio problems

Higher buffer size = more latency but lower risk of audio problems

Very high buffer size = possible system instability

For most systems, there is a “sweet spot” where latency is not too high and system performance is good. Experiment with raising or lowering buffer sizes to hit this sweet spot.

As you begin adding plug-inEQ, compression, and so forth to your project, your computer will need to work harder. If you start to hear clicks, pops and other glitches in your audio, consider increasing your buffer size at this time.

As a final note, one tremendous benefit that the MultiMix FireWire offers is that you can monitor through it without latency at all. Simply press down the MIX TO CTRL ROOM button, and you can hear what you’re recording without havig to worry about your computer’s settings.

Adjusting the sample rate

You can change the sample rate that the MultiMix uses in this area.

Some audio programs require that you change the sample rate under their Project Setup or similar menus as well. For instance, in Cubase, be sure that the sample rate selected here matches the settings under the “Project” | “Project Setup…” menu.

Many people use two latency settings—alower one when recording tracks and a higher one when mixing.

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Using the MultiMix FireWire with Sonar and other WDM applications

Choosing the MultiMix as your audio device

1.Choose the menu “Options” | “Audio….”

Choosing the MultiMix as your audio device

Unlike ASIO, WDM allows multiple audio devices to be used at the same time.

However, doing so can cause all sorts of synchronization problems. Therefore, we suggest that you use the MultiMix as your sole audio input/output device.

2.On the “General” tab, select any available MultiMix channels as the Playback and Record timing masters.

This discussion uses Cakewalk’s Sonar software, but the principles provided here apply to all WDM-basedrecording software.

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3.Click the “Advanced” tab. For WDM operation, be sure that the “Driver Mode” is set to “WDM/KS.” (If you change this setting, you will need to exit and then restart Sonar.)

For applications like Sonar that support both WDM and ASIO modes, you may want to experiment with each to see if either mode offers greater stability.

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4.Move to the “Drivers” tab. Click on each input pair and also on the output pair to make them available to Sonar.

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Assigning inputs to audio tracks

Now, you’re ready to assign the MultiMix’s inputs to various channels.

For each audio track that you want to record, click on the input section of the track and select the MultiMix channel that you want.

Record-enablethe tracks to be recorded (first arrow).

You will do most of your monitoring through the mixer. However, if you want to monitor with Sonar’s effects, or if you just want to hear what the computer is hearing, press the direct monitoring button next to the Record Enable button (second arrow.).

Note that using direct monitoring causes a small delay as the digital audio is being processed. For this reason, when you use direct monitoring, you may want to press the MultiMix’s MIX TO CONTROL ROOM button up so as not to hear the audio signal twice.

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Using the MultiMix FireWire with

CoreAudio on the Macintosh

Mac users can impress their friends with the following instructions for using the MultiMix with CoreAudio:

1.Open the Mac’s “Audio MIDI Setup” utility.

2.Choose the MultiMix FireWire as both input and output device.

3.Choose the MultiMix as the default input and output.

4.Under System Preferences, choose “MultiMix FireWire.” Adjust the device nickname, buffers, clock source, sample rate, etc. as needed. For additional information on these settings, see the discussion of the ASIO control panel on page 40.

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Mac OS X 10.3 or higher is required by the MultiMix drivers.

6 Troubleshooting:non-Firewire

If you’re having problems operating the MultiMix, this troubleshooting index will help you correct them.

Symptoms

No sound from the mixer.

Cause

Mixer is not plugged in or turned on.

Faders are too low.

Control room level is too low.

The appropriate signal hasn’t been assigned to the control room out.

Cable is not plugged into output jack.

Headphones are not plugged into PHONE jack.

Monitor or headphone amplifier is turned off or down.

Solution

Plug in mixer and turn it on.

Raise appropriate faders.

Turn up control room level.

In the master section of the mixer, be sure the right switch is selected (MIX, ALT 3/4 or 2TK).

Check outputs to make sure cables are plugged in securely.

Plug headphones into PHONE jack.

Turn amplifier on or up.

 

 

Bad cable.

 

Check all cables; substitute

 

 

 

 

cables with known good ones.

 

 

 

 

 

Audio signal is distorted.

 

Channel level is too high.

 

Set channel levels using the

 

 

 

 

procedure on page 12.

 

 

Channel input is too high.

 

Turn down your instrument to a

 

 

 

 

normal volume and then set

 

 

 

 

channel levels using procedure

 

 

 

 

on page 12.

AUX RET B level is too high.

MAIN MIX level is too high.

ALT 3/4 level is too high.

Lower the level of AUX RET B in the master section of the mixer.

Lower the MAIN MIX fader in the master section of the mixer.

Lower the ALT 3/4 fader in the master section.

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6 Troubleshooting:non-Firewire

Audio signal carries an

 

Too much low-levelnoise in

 

Engage the channel’s high-pass

unwanted hum.

 

the mix.

 

filter by pressing the HPF

 

 

 

 

switch.

 

 

Interference from appliances

 

Engage the channel’s high-pass

 

 

such as air conditioners.

 

filter by pressing the HPF

 

 

 

 

switch.

 

 

Not using TRS cables.

 

Make sure you are using 1/4”

 

 

 

 

TRS cables.

 

 

 

 

 

Microphone level is too low.

 

Phantom power is not

 

Turn on phantom power using

 

 

turned on.

 

the switch on the rear panel of

 

 

 

 

the mixer.

 

 

Microphone is damaged.

 

Test the microphone on other

 

 

 

 

audio devices. If you detect

 

 

 

 

damage, contact the

 

 

 

 

manufacturer or dealer.

 

 

 

 

 

No or low sound from a

 

Fader is too low.

 

Raise channel fader.

channel.

 

 

 

 

 

 

Instrument volume is too

 

Turn up the instrument’s

 

 

low.

 

volume control. If problem

 

 

 

 

persists, check the instrument by

 

 

 

 

plugging headphones into the

 

 

 

 

instrument’s phone jack.

 

 

Channel is muted.

 

Check the MUTE / ALT 3/4

 

 

 

 

switch.

 

 

Gain is too low.

 

Adjust the channel’s GAIN

 

 

 

 

control.

 

 

 

 

 

Internal effects aren’t

 

Effects level is too low.

 

Turn up the level using the

working.

 

 

 

EFFECTS / AUX RET B

 

 

 

 

LEVEL control in the master

 

 

 

 

section of the mixer.

 

 

An effect hasn’t been

 

Press the EFFECTS knob on

 

 

selected.

 

the desired effect and make sure

 

 

 

 

the SIG indicator is lit.

 

 

 

 

 

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