User Manual

MENU AND DIALOG REFERENCE
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• If you are using audio hardware for which there is a specific ASIO driver, you should select this.
With an ASIO driver written specifically for the audio hardware you will get lower latency (see below), support for
higher sampling frequencies (up to 192 kHz in 24 bit/32 bit float resolution), and possibly better support for addi-
tional hardware features such as multiple outputs.
• If there is no specific ASIO driver, you could select a generic ASIO driver for the audio hardware.
! Record requires that the audio card uses an ASIO driver on Windows systems, if you want to use both audio in
and audio out. Direct X and MME drivers only support audio out.
Audio Device – Mac OS X
This menu lists all the available Audio Devices on your system, and lets you select which one Record should use.
Which option to select depends on the audio hardware:
• If you are using audio hardware for which there is a specific Core Audio driver, you should select this.
With a Core Audio driver written specifically for the audio hardware you will get lower latency (see below), support
for higher sampling frequencies (up to 192 kHz in 24 bit/32 bit float resolution), and possibly better support for
additional hardware features such as multiple outputs.
Sample Rate
Record handles all internal audio processing in 32-bit floating point resolution, with 64-bit summing in the mix bus in
the Main Mixer Master Section. However, the resolution of the input and output audio is determined by the hardware
audio interface. That is, if you have a 24-bit audio card, Record will record and output audio in 24-bit resolution, and
if you have a 20-bit audio card, audio will be recorded and played back in 20-bit resolution.
The Sample Rate can be specified on the Audio tab in the Preferences dialog. See “Sample Rate settings for record-
ing and playback” for more details.
Buffer Size
The Buffer Size determines the Input and Output Latency of the audio. Generally, the smaller the Buffer Size, the
lower the latency. However, too low a Buffer Size setting could result in clicks, pops, dropouts, etc. in the audio.
Therefore, the Buffer Size should be set to an “optimal” value rather than to the lowest value. See “Buffer Size set-
tings” for more information.
Input and Output Latency
The Input latency is the delay between when the audio is “sent” from a connected microphone or instrument and
when it’s received and detected by Record. Output latency is the delay between when audio is “sent” from Record
and when you actually hear it. The latencies in an audio system depends on the audio hardware, its drivers and their
settings.
When you select a driver, its latency values are automatically reported by the audio card and displayed in the Prefer-
ences-Audio dialog. Depending on the audio hardware and the driver, you may be able to adjust these values:
• If you are using an ASIO driver specifically written for the audio hardware under Windows, you can in most
cases make settings for the hardware by clicking the Control Panel button.
This opens the hardware’s ASIO Device Control Panel, which may or may not contain parameters for adjusting the
latency. Usually this is done by changing the number and/or size of the audio buffers - the smaller the audio buf-
fers, the lower the latency. Please consult the documentation of your audio hardware and its ASIO drivers for de-
tails!