radio95/fm95
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update readme

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kuba
2025-03-26 21:07:37 +01:00
parent 6a47e304dd
commit 66ca7317d5
2 changed files with 10 additions and 6 deletions
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.vscode/.server-controller-port.log
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@@ -1,5 +1,5 @@
{ {
"port": 13452, "port": 13452,
"time": 1743013405321, "time": 1743019078692,
"version": "0.0.3" "version": "0.0.3"
} }
README.md
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@@ -10,9 +10,9 @@ FM95 is a audio processor for FM, it does:
Supports these inputs: Supports these inputs:
- Audio (via Pulse) - Audio (via Pulse)
- MPX (via Pulse) - MPX (via Pulse, basically passthrough, i don't recommend this unless you have something else than rds or sca to modulate)
- RDS (via Pulse, expects unmodulated RDS, stereo, left channel on 57 KHz, right on 66.5) - RDS (via Pulse, expects unmodulated RDS, stereo, left channel on 57 KHz, right on 66.5, rds95 is recommended here, in modulation this is inphase to the pilot)
- SCA (via Pulse) - SCA (via Pulse, by default on 67 khz with a 7 khz deviation)
and one output: and one output:
@@ -33,7 +33,7 @@ Done!
## CPU Usage? ## CPU Usage?
Should run completly fine on a pi 5, right now with the preemp and rds2, on a pi 3b, its 25% Should run completly fine on a pi 5, right now with the preemp and rds2, on a pi 3b, its 25%-27%
## Recommendations ## Recommendations
@@ -41,6 +41,10 @@ use a lpf, for example swh-plugins's lowpass_iir, for example:
```bash ```bash
pactl load-module module-null-sink sink_name=FM_Audio rate=48000 # this goes to fm95 pactl load-module module-null-sink sink_name=FM_Audio rate=48000 # this goes to fm95
pactl load-module module-ladspa-sink sink_name=FM_Audio_lpf sink_master=FM_Audio plugin=lowpass_iir_1891 label=lowpass_iir control=15000,6 rate=48000 # use 4 poles minimum pactl load-module module-ladspa-sink sink_name=FM_Audio_lpf sink_master=FM_Audio plugin=lowpass_iir_1891 label=lowpass_iir control=15000,6 rate=48000 # use 4 poles minimum, i recommend 6
pactl load-module module-loopback source=radio_audio.monitor sink=FM_Audio_lpf rate=48000 # from the apps to the filter pactl load-module module-loopback source=radio_audio.monitor sink=FM_Audio_lpf rate=48000 # from the apps to the filter
``` ```
## Other Apps
FM95 also includes some other apps, such as chimer95 which generates GTS tones each half hour, and dcf95 which creates a DCF77 compatible signal