Finally got around to doing a few full 24 bit performance tests using the Raspberry Pi. Both THD+N and dynamic range were almost exactly what they had been using the Teensy as a test platform.
Measured THD+Ns were -100dB on the left channel and -101dB on the right:
Measured A-weighted dynamic range was -106dB on the left channel and -107dB on the right:
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