To: | [email protected] |
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Subject: | Re: LF: Raspberry Pi sound interface that works |
From: | Paul Nicholson <[email protected]> |
Date: | Wed, 15 Feb 2017 14:03:51 +0000 |
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I realised that the input and output caps couldn't be the cause of the temperature dependence: the signal and reference frequencies are so far from the corner frequency. It looks like the problem is a defect in the ebsynth software. The input and output buffer delays change slightly as the sample rate varies with temperature. The program isn't correcting for the delay changes. Hopefully have that fixed shortly once I figure out a way to correct it without introducing some slowly accumulating numerical error. > 6 synchronous sampled inputs, that's the perfect system > for the tree. Due April, so they say. I hope it doesn't need an RPi 3 because the power budget then has to allow for the unused built-in Bluetooth and WiFi. I wonder if it A/D converts 6 inputs in unison, or does them sequentially. It might do them in stereo pairs. We'll have to wait and see. -- Paul Nicholson -- |
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