M-AUDIO 2626 Manuel D’Utilisation

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User Guide
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ProFire 2626
Sample Rate
This drop-down menu sets the sample rate of ProFire 2626   Note that when using the interface with an ASIO or 
CoreAudio application, the sample rate can also be determined by your audio application   This parameter may not 
be editable from within the ProFire 2626 Control Panel if your audio application is running   In this case, any changes 
to the sample rate must be made through the audio application itself  If the application does not provide a way to set 
the sample rate, quit the application, then change the sample rate through the ProFire 2626 Control Panel   
  Attention Vista Users:  When using the ProFire 2626 WDM/MME (i.e., non-ASIO) drivers, the sample rate 
of the interface (and your audio software) is always determined by this drop-down menu.  Your selection in this 
menu is the only item that will appear in your audio application.  For example, if you select “44.1kHz” in this 
menu, your audio application’s control panel will only display “44.1kHz” and you will not be able to select any 
other rates from within the application.
When the sample rate is locked to an external digital clock source, the Power Indicator LED (10) remains 
continuously illuminated; when the sample rate is unlocked, the Power Indicator LED (10) blinks and a warning 
message appears in a red rectangle just below the Sample Rate menu 
         
Buffer Size (Windows only)
 
This menu sets the size of the input and output buffers on ProFire 2626   
 
 Buffers are used to help keep audio hardware and software running smoothly by processing audio in groups 
of samples rather than one sample at a time   Due to variations between computer hardware and software, it 
is impossible to recommend a single optimum setting for all systems   It may be necessary to experiment with 
various settings until you find the best buffer size for your system   
 
 The goal of setting a buffer size is to reduce it as much as possible without hearing any clicks, pops, or other 
glitches   If the buffer size is too small, the computer will not be able to make all the required audio calculations 
on time and you will hear pops, clicks, and stuttering in your audio streams   On the other hand, if the buffer 
size is set too high, your computer will process audio without incident, but your software will feel sluggish and 
unresponsive 
 
 To find your system’s optimum buffer size setting, begin with a 
high setting and gradually reduce the size until you begin to hear 
clicks, pops, or other audible glitches in your audio   Then, raise 
the buffer size setting until these glitches disappear   You may 
need to stop playing audio any time you change this setting and 
certain applications will require you to re-launch the program 
before the new buffer size settings become active 
NOTE:  This menu only appears on 
Windows systems.  Most Mac OS 
X applications allow to change the 
buffer size from within the audio 
application itself.  Please see your 
audio application’s user guide to learn 
how to change this setting.
Windows only:  
Buffer Size drop-down menu.