4 ms·
Why are there two store-and-hold circuits? Is it for smoothing the output waveform? I was thinking it could be to produce a stereo output using a single chip b
by chiph 5y ago
Why are there two store-and-hold circuits? Is it for smoothing the output waveform?
I was thinking it could be to produce a stereo output using a single chip by alternating between left/right [0]. But the output is summed and as far as I know, the 1/4" jack is mono.
[0] My first CD player, the Sony CDP-101 did this. It only had a single DAC so there was a 11µs delay between left + right channels. While I loved it, any $60 Walmart player has better sound these days.
- kens 5y agoOne theory is that it reduces intermodulation distortion since any particular signal only changes half as much. Another theory is that it was to support stereo, but as you say, the DX7 is mono. I did some Fourier analysis to see if it reduced artifacts from the time-domain multiplexing, but the effect was small. TL;DR: I don't know.