Re: [music-dsp] advice regarding USB oscilloscope
I've used the $400-or-so Rigol model (I forget the number), the interface is a bit clunky as one might expect with all the menus and features, but it works well. The "traditional" scopes only go to 8 bits, or maybe 12 bits at the most. As always, look carefully at the specs. A lower cost alternative to AP (you can get older models used, but they're still expensive) is QuantAsylum, which makes several connect-to-PC-through-USB boxes, notably for high-quality (16 bit or greater) audio is the QA401: https://quantasylum.com/ I suggest reading this whole thread, which started about when the company did, before buying: http://www.diyaudio.com/forums/equipment-tools/231401-quantasylum-qa400-qa401.html On Tue, Mar 7, 2017 at 2:08 PM, Govinda Ram Pingali wrote: > This may be a bit overkill for what you are looking for but since you > mentioned you'd like "invest", I'm putting this forward: > > Audio Precision (https://www.ap.com/) > > They make analog data acquisition hardware and a companion software > application, specifically meant for testing audio devices. Many speaker, > headphone and other audio product manufacturers use Audio Precision for > testing during R&D and on the assembly line in the factory. The hardware is > just a very quality A-D and D-A converter, but the software is very > powerful. They come with all sorts of test signals and analysis algorithms. > You can also write custom scripts on top of the existing algorithms, but I'm > not sure if Python is supported. > > They do cost quite a bit, starting from USD 5000 and upwards. Probably more. > Note: it only works on Windows. > > On Mar 7, 2017, at 6:59 AM, Remy Muller wrote: > > 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? > > > ___ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp > > > ___ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp
Re: [music-dsp] advice regarding USB oscilloscope
This may be a bit overkill for what you are looking for but since you mentioned you'd like "invest", I'm putting this forward: Audio Precision (https://www.ap.com/) They make analog data acquisition hardware and a companion software application, specifically meant for testing audio devices. Many speaker, headphone and other audio product manufacturers use Audio Precision for testing during R&D and on the assembly line in the factory. The hardware is just a very quality A-D and D-A converter, but the software is very powerful. They come with all sorts of test signals and analysis algorithms. You can also write custom scripts on top of the existing algorithms, but I'm not sure if Python is supported. They do cost quite a bit, starting from USD 5000 and upwards. Probably more. Note: it only works on Windows. > On Mar 7, 2017, at 6:59 AM, Remy Muller wrote: > > 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? > > > ___ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp > ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp
Re: [music-dsp] advice regarding USB oscilloscope
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 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? ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp
[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? ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp
