# APRS debugging

## Direwolf

```bash
rx_fm -f 434250000 -M fm -s 250000 -r 48000 -g 22 -d driver=rtlsdr - | direwolf -n 1 -D 1 -r 48000 -b 16 -
```

```bash
rtl_fm -f 434250000 -M fm -s 250k -r 48000 -g 22 - | direwolf -n 1 -D 1 -r 48000 -b 16 -
```

## SigPlay

See: https://bk.gnarf.org/creativity/sigplay/

```bash
rx_fm -f 434250000 -M fm -s 250000 -r 48000 -g 22 -d driver=rtlsdr - | ./aprs -
```

```bash
rtl_fm -f 434250000 -M fm -s 250k -r 48000 -g 22 - | ./aprs -
```