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frntc / SIDKick-pico

SIDKick pico is an inexpensive dual-SID-replacement for the C64 and C128
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No sound on PWM using C64 250407 with swedish keys and swedish kernal. #65

Closed mwedmark closed 3 months ago

mwedmark commented 4 months ago

DAC works and gives sound but PWM gives a superlow sound (close to nothing) into TV via RF-signal. Tried 3 different SIDkick pico with both later FW 0.2 and former 0.14. No changes. Works with original SID-chip and gives sound to TV via original SID chip.

frntc commented 4 months ago

For sure there's no relation to the Swedish kernal or keyboard. The original SID has different voltage levels, so you might want to check the circuitry between "audio out" at the SID socket and the audio/video connector (see https://www.zimmers.net/anonftp/pub/cbm/schematics/computers/c64/251138-1of2-combined.gif -- R6, FB13, Q8, R38, ...)

mwedmark commented 3 months ago

Thanks. Yes there was a problem with a cable, not connected to SIDkick. I'm closing this as a non-Sidkick Pico problem.