Need educated model/feature advice for oscilloscope for doing high-quality audio

[NiHaoMike]

I have a UCA200 that I got for $0.25 at a garage sale, but it only does 48kHz sample rate.

If you want a moderately fast digitizer, it might be best to just build one. Especially since you need less than 1MHz sample rate. Just an opamp AFE, an ADC, and a FPGA or microcontroller is all that's needed.

[Ronnie]

The proper tool for this job would probably be something by companies like Audio Precision.

I agree with Alm "companies like Audio Precision" or ShibaSoku, I think these equipment are expensive maybe with a price tag of US$5,000 or more!

http://www.shibasoku.com/products/avc/audio_comm.html