Playback frequency (PB FREQ). Yamaha CBX-D5

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8 Playback

Playback frequency (PB FREQ)

During playback, sound files are read from disk, processed in the CBX-D5, then output.

The CBX-D5 can read sound files that were recorded at sampling frequencies between

11.025kHz and 48kHz. Once inside the CBX-D5, the data is processed at the currently set

REC FREQ. Then it is output to the digital outputs at a rate determined by the PB FREQ, and to the analog outputs after analog to digital conversion.

The CBX-D5 can output digital audio at one of two sampling frequencies: 44.1kHz and

48kHz. The playback frequency is set by the controlling software and the CBX-D5’s PB

FREQ indicators show the selection.

NOTE: When the CBX-D5 is used with an external word clock, the digital outputs will operate at the same frequency as the external word clock and that frequency will not be indicated by the “PB FREQ” indicators.

The choice of playback frequency will usually be determined by the sampling frequency of the device to which the digital audio is being sent, i.e., a DAT recorder, DCC recorder, digital mixer, etc. There is nothing to be gained by playing a 44.1kHz recorded sound file at 48kHz, and little to be lost by playing a 48kHz recorded sound file at 44.1kHz.

Output level meters

The four output level meters show the output level of each channel. The output level of each channel can be controlled by the controlling software. The maximum output level is

+18dBm. So an analog output signal of about +18dBm will light the CLIP LED.

Sound file playback compatibility

As well as its own sound files, the CBX-D5 can also playback the following sound file formats. These sound file formats are often used with the Apple Macintosh computer.

Sound Designer

Sound Designer II (mono and stereo)

Audio IFF (Interchange File Format)

The CBX-D5 can record and playback mono and stereo 2-channel interleave files.

4-channel interleave files can be played back only.

MONO FILE

DATA

1 1 1 1

STEREO 2-CHANNEL

INTERLEAVE FILE DATA

1 2 1 2

4-CHANNEL INTERLEAVE

FILE DATA

1 2 3 4 1 2 3 4