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Yamaha psr s950 tutorial2/12/2023 I am comparing SWP characteristics as deployed in the S970 (SWP70) and the S950 (SWP51L) workstations. The higher crystal frequency and faster memory read clocks lead me to believe that the SWP70 is clocked twice as fast as the SWP51L. Thus, it makes sense to derive Fs and its multiples from the chip-level master clock. This funky looking clock rate is a multiple of 44,100 Hz: The SWP70’s external clock crystal frequency is 22.5792 MHz versus 11.2896 MHz for the SWP51L. The SWP70 has much in common with the SWP51L, but also some very significant differences. The SWP70 replaces the SWP51L, which has been the mainstay in recent generations of Tyros, upper range PSR, Motif, and MOX series workstations. (“SWP” stands for “Standard Wave Processor.”) The SWP70 is a new TG family in a long line of Yamaha tone generators. As I mentioned in an earlier post, the Yamaha PSR-S770 and PSR-S970 arranger workstations have a new tone generator (TG) integrated circuit (IC) - the SWP70.
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