Perhaps only tangentially related, but Bela - of which I am one of the
developers - comes with a browser-based oscilloscope as part of its IDE. This
allows you to generate both analog inputs and internally, digitally-generated
signals, e.g.:https://www.youtube.com/watch?v=o9kLZ--js1k
https://www.youtube.com/watch?v=AoP7rPAMpvk
it also has FFT mode (not shown in the videos above).
It is fully programmable in C++, PureData, SuperCollider and Pyo (that is
Python!)
16 bit inputs and outputs:
* 2 I/O are AC-coupled, sigma-delta (audio), at 44.1kHz* DC-coupled SAR ADCs.
Input voltage: 0-4.096V. You can have either 8 at 22.05kHz or 4 at 44.1kHz or 2
at 88.2kHz.* DC-coupled string DACs. Output voltage: 0-5V. You can have either
8 at 22.05kHz or 4 at 44.1kHz or 2 at 88.2kHz.
Again, may not be the most suitable for your application, but it is fully
programmable. Scaling of 20V down t 4.096V can be done either through a passive
resistor voltage divider or active circuitry (which would require an external
power supply).
Best,Giulio
Giulio MoroPhD researcherCentre For Digital Music (C4DM)
Queen Mary, University of London
From: Remy Muller <muller.r...@gmail.com>
To: music-dsp@music.columbia.edu
Sent: Tuesday, 7 March 2017, 14:59
Subject: [music-dsp] advice regarding USB oscilloscope
Hi,
I'd like to invest into an USB oscilloscope.
The main purpose is in analog data acquisition and instrumentation.
Since the main purpose is audio, bandwidth is not really an issue, most
models seem to provide 20MHz or much more and I'm mostly interested in
analog inputs, not logical ones.
Ideally I'd like to have
- Mac, Windows and Linux support
- 4 channels or more
- 16-bit ADC
- up to 20V
- general purpose output generator*
- a scripting API (python preferred)
* I have been told that most oscilloscopes have either no or limited
output, and that I'd rather use a soundcard for generating dedicated
test audio signals, synchronizing the oscilloscope acquisition using the
soundcard's word-clock. However not having to deal with multiple drivers
and clock synchronization would be more than welcome.
A friend of mine recommended using Picoscope which seems well supported,
has a strong user community but no official support for python AFAIK.
https://www.picotech.com/oscilloscope/5000/flexible-resolution-oscilloscope
I also found about bitscope http://www.bitscope.com which looks more
oriented toward the casual hacker/maker, seems more open-ended and has
python support, much cheaper too.
What about the traditional oscilloscope companies like Tektronix, Rigol ?
Has anyone experience with any of those? or any other reference to
recommend?
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