FreeCalypso > hg > freecalypso-hwlab
view audio-tones/README @ 166:ef1b8b6c4aee
doc/USB-IDs: new paradigm
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 31 Jul 2023 00:00:13 +0000 |
parents | 9336a48746d9 |
children |
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As of 2021-11, we are still far away from being able to clean up the implementation of audio tones in our handset UI fw: before we can clean up the implementation of audio tones, we will first need to detangle the wrong-minded coupling between these audio tones and the buzzer, and that detangling will require a development platform with a working buzzer, which means FC Venus. However, we can apply a band-aid fix to the current misdesigned Condat audio driver that would allow keybeep tones to be re-enabled on FC Luna with FC-HDS4 without being brutal on the developer-operator's ears: we can change the dBfs amplitudes baked into F_xxx defined constants, and we can conditionalize this change on CONFIG_TARGET_LUNA. With this method we are constrained to picking just one amplitude for the 3 different tones based on F_425 (busy, CW and ringing) and likewise the same amplitude between the half-tone of keybeep and the low tone of DTMF - but we are not seeking fully optimal tuning here, only a band-aid fix to protect the developer-operator's hearing. The set of shell scripts contained in this directory was put together to facilitate easier experimentation with different amplitudes, easier than entering full AT@TONE commands manually. Amplitude selections being made for now: Keybeep-half and DTMF-low: -26 dBfs DTMF-high: -24 dBfs F_425 tones: -21 dBfs