Re: Digital 'cassette' recorder
PsychMan,
Good question!
I was aiming for a similar frequency response and SNR to an ordinary cassette recorder, back in the day. I chose a sample rate of 31.25kHz to achieve a 10kHz bandwidth (with a little room for filter roll-off), and an SNR of 50dB or so. I used 10 bit samples, mostly because the PIC's ADC is ten bits.
Although 8 bits would give theoretically 48dB SNR, there is an undesirable effect whereby the noise seems to 'come up' as a sound decays. It's kinda like a 'fffffff' sound during the decay of say, a piano note. 10 bits seems to stop that.
Oh, and it's mono of course!
Last edited by Karen O; 10th Sep 2019 at 8:37 pm.
Reason: Mention that it's monophonic
|