Alesis ALESIS M20 owner manual Sample Rate Selection, Formatting Tape, Chapter

Formatting Tape, Chapter 4

4.1SAMPLE RATE SELECTION

Choose between 44.1 kHz (CD/consumer standard) or 48 kHz (DAT/professional standard). Here are some general hints:

∙If mixing the tape through a digital mixer for a CD master, use 44.1 kHz to avoid sample rate conversion.

∙If mixing the tape through an analog mixer, use 48 kHz for slightly better high frequency response.

∙If you plan to transfer M20 tracks over to a hard disk system for editing, note that audio recorded at 48 kHz requires about 10% more storage capacity than the equivalent audio recorded at 44.1 kHz.

The following sample rate selection procedure assumes that Clock Source is set to INTernal.

Operation	You press…	You see…
Select sample rate	Sample Rate	Sample Rate block toggles between 44.1
	button	or 48 kHz (default) with each Sample
		Rate button press

About changing sample rates: The sample rate chosen during the format process does not have to be used during playback or recording of that particular tape; the ADAT format always allows you to override the default sample rate from the tape. When loading a formatted tape, the sample rate will automatically switch to the tape’s original settings. You may change the sample rate setting to playback or record with a different sample rate, but the sample rate indicator will flash to indicate that it is not at the original setting. Changing the sample rate directly affects the pitch and speed of any audio recorded.

When extending a format, the sample rate will automatically assume the existing format’s values. There is no way to format a tape with a “44.1” marker on one section and a “48” marker on another.

4-2 ALESIS M20 REFERENCE MANUAL 1.06