Cirrus Logic CS42L42 Manual page 65

Table 4-14 describes using different sample intervals with SoundWire frame rate of 48 kHz:
Sample Interval
Length of the SoundWire frame
Half the SoundWire frame length
Twice the SoundWire frame length
N times the SoundWire frame length One sample every Nth frame, generating a 48/N-kHz rate. 8 kHz is the minimum rate for the CS42L42.
Running all ports with 44.1 kHz requires a different SoundWire clock or frame shape that matches 44.1 kHz along with
adjusting other parameters accordingly. An 11.2896-MHz SoundWire clock with a 64 x 8 frame shape works well with a
frame rate of 44.1 kHz. Note that this does not apply to isochronous streams, which are converted to 48 kHz before being
sent to the SoundWire block.
DS1083F2
Table 4-14. Sample interval/Sample Rate Examples
48-kHz sample rate with one sample for each channel per frame.
Two samples per frame for a 96-kHz sample rate. (see
One sample every second frame for a 24-kHz rate.
4.8 SoundWire Interface
Sample Rate
Ex. 4-4)
CS42L42
65