changeset 12:b57c380d78e7

aud-fcdev3b/README: explanation of new vs. historical configs
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 09 Oct 2021 04:26:59 +0000
parents 46f49aa6ab8c
children 39efa8203dfe
files aud-fcdev3b/README
diffstat 1 files changed, 13 insertions(+), 0 deletions(-) [+]
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+spkr0 is the new (as of 2021-10) audio mode config for FCDEV3B
+loudspeaker+microphone voice call kit.  The other two configs are historical
+and should no longer be used:
+
+spkrmax config was my (Mother Mychaela's) concoction at the time when I tried
+to use tiny cellphone-sized speakers, which were too quiet in the absence of
+special mechanics and acoustics.  It needs to be noted that setting a positive
+speaker "calibration" gain in the Iota ABB with the volume control set to max
+and with the waveform at full scale produces clipping instead of more Vpp
+output, hence this approach is not really a solution.
+
+mcsi config was an early method of entering MCSI digital voice mode, but this
+method should no longer be used, as it is broken - use AT@VSEL=1 instead.