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The advantage of this is that it allows for a sample based on a linear PCM scale to be
output accurately on the SN76489 (allowing for louder sounds) and it can potentially
output any bitdepth source audio. The disadvantage is that, with a limited output rate,
one is forced to trade off between the bitdepth and sampling rate of the input sample:
with a maximum output rate of 20kHz, for example, one may choose a 6.67kHz 3-bit
source sample, a 5kHz 4-bit source sample, etc. This can be severely limiting for the
quality. (Note: the output limit, 20kHz in this example, has yet to be determined for the
SMS and will vary depending on how the data is encoded and the playback efficiency.)
On the Master System, PWM is not very good quality (often the sound is unintelligible, for
example Alex Kidd: the Lost Stars' "Find/I'm the Miracle Ball" and Shooting Gallery's
"Perfect"), but it is the loudest way to play samples.
Summary of Contents for Franky
Page 1: ...Instruction Manual ...