Friends --
I'm having trouble with some output of an Audient id44 with Ubuntu Studio 18.04.
My *first* problem is: what are these errors called? Once I know how to describe these, then I'll ask about my detailed question. At this point I have no idea if these are an ordinary symptom of a configuration error or if they are indicative of some kind of driver bug.
The output is 440 Hz sine
Error type 1: "missing samples"
Error type 2: "inserted pause"
Thanks for any tips.
Jonathan.
What are these errors called? Oscilloscope traces shown
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Re: What are these errors called? Oscilloscope traces shown
I'm not sure if there's a single term for those errors. It is possible they are the result of 'xruns', which is the umbrella term for buffer underruns and overruns: the application generating the sine either producing too much data for the sound card buffer to keep up, or not producing enough data in time. Usually you would also find them in the logging somewhere.
What application are you using the generate the sine? How are you feeding it into your sound card?
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Re: What are these errors called? Oscilloscope traces shown
Apart from discontinuity, both traces are showing a DC offset towards the positive (unless the scope is out of callibration).
The Yoshimi guy {apparently now an 'elderly'}
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Re: What are these errors called? Oscilloscope traces shown
Thanks answerers!
raboof -- thanks, they do seem consistent with underruns and overruns. I'll ask proper question with all the environment and details later (this was `aplay`, with a cd-quality test tone.)
folderol -- "discontinuity" sounds a little mathematical, I'm not sure anybody would know what I meant if I said I was getting discontinuities in my output. I noticed the DC bias too, but that's not today's problem for me.
raboof -- thanks, they do seem consistent with underruns and overruns. I'll ask proper question with all the environment and details later (this was `aplay`, with a cd-quality test tone.)
folderol -- "discontinuity" sounds a little mathematical, I'm not sure anybody would know what I meant if I said I was getting discontinuities in my output. I noticed the DC bias too, but that's not today's problem for me.