Hardware Page - M-Audio ProjectMix I/O User Manual

You can create two separate headphone mixes by assigning one of the headphone channels to monitor a different source, such as the 3/4
bus or the aux bus, using the small buttons under "mon" in these channels. You'll also notice that you have direct control of the headphone
volume faders using the two headphone level knobs on the ProjectMix I/O control surface.
Below the output channels are miniature meters for the software return and input buses. These mirror the levels on the mixer page.

Hardware Page

The hardware page is where you configure various options for the ProjectMix I/O audio interface (click the hardware tab to open this page).
This window is divided into four sub-windows, described below:
Sample Settings Sub-Window (sample settings)
The sample settings window has two parameters:
Sample Rate (sample rate detected) is a display-only value that shows the current sample rate which is set within your digital audio
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software.
Buffer Size (ASIO/WDM buffer size) is only available for Windows users. In this field, you can select the buffer size you wish to work with.
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Smaller buffer sizes result in lower latency (the time it takes for your input signal to pass through your audio software and appear at the
outputs), but may not function well with slower systems. The default buffer size setting is 256. This setting may adequately serve your
purposes, but if you wish, you can experiment with lower settings. If you experience stuttering or crackling in your audio playback, try
using a larger buffer size.
NOTE: On the Mac, buffer size adjustment is set within your DAW software.
Sync Source Sub-Window (sync source)
The four radio buttons in sync source select the clock source for the ProjectMix I/O:
Internal – Digital Inputs Muted Setting (internal – digital inputs muted): This setting uses the ProjectMix I/O internal crystal as the
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clock source and mutes the digital inputs. This is useful if you have digital equipment continuously connected to a digital input on the
ProjectMix I/O. In this type of setup, if you switch to internal clock, the external gear will no longer be synchronized with the ProjectMix
I/O resulting in a horrendous noise. In this situation, select "internal – digital inputs muted" as your sync source.
Internal – Digital Inputs Unmuted Setting (internal – digital inputs unmuted): This setting also uses the ProjectMix I/O internal crystal
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as the clock source, but leaves the digital inputs unmuted. This is useful if you have digital equipment connected to a digital input while
the digital equipment is synchronized to the ProjectMix I/O. For example, if you have connected the ProjectMix I/O word clock out to the
word clock input of the external digital device, that equipment will remain synchronized to the ProjectMix I/O internal clock. Using this
option will ensure that the digital equipment's signals remain audible through the ProjectMix I/O.
External – Digital Setting (external – digital): This setting is used when synchronizing the ProjectMix I/O to the incoming digital clock
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of an external device. In this case, the ProjectMix I/O will obtain its clock from the incoming digital stream.
Word Clock Setting (word clock): This setting is used when synchronizing to a clock signal from a master clock generator connected
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to the ProjectMix I/O WORD CLOCK IN.
NOTE: When using either the external – digital or word clock options, the sample rate will be determined by the external clock source. If you
were working on a project with a sample rate of 44,100Hz and sync the ProjectMix I/O to a clock source at 48,000Hz, your project will play
back too fast. Make sure your external clock rates match your project rates.
The Control Panel
ProjectMix I/O User Guide
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