[Coco] CoCo 2 cassette audio on emulators

[Ricardo M. Ferreira]

Dear all,

Do you know of a CoCo 2 emulator than can play cassette audio with high 
quality?

Unfortunately now I don't have with me my Coco 2 (a Brazilian CP-400, 
actually), so I'm using XRoar. IIRC, on the real machine I could hear on 
the TV the audio from a cassette tape by typing AUDIO ON:MOTOR ON, and 
the quality of the audio was "perfect" (i.e., sounding as if I had 
connected the cassette tape directly to the TV audio input).

I did a few tests on XRoar, and while data loads fine from .WAV files, 
music doesn't sound very good due apparently to a low sampling rate by 
XRoar, no matter the quality of the .WAV file. For example, I tried to 
play a 44100 Hz, 16 bit, mono sample (that sounds perfect when played on 
any program) using XRoar, and it sounds like 8 bit & less than 10 kHz.

I'm looking at XRoar's source to try to figure out if I can apply a 
patch, but if someone knows about an alternative solution, I'd be glad 
if you could let me know.

Thanks!