cloud/sdr backend will be deprecated soon!
Read the Software Defined Radio documentation to configure this example service.
Assuming that ibm.sdr is the host name:
Get a list of the frequencies of strong radio stations.
curl ibm.sdr:8080/freqs
Example response:
If the SDR hardware is present it will return a list of string FM stations.
{"origin":"sdr_hardware","freqs":[89700000,91100000,91900000,93300000,94500000,95700000,96100000,97700000,99100000,101500000,102300000,103700000,105100000,107900000]}
If the SDR hardware is not present or can not be used for some reason it will return a single station of frequency 0.
{"origin":"fake","freqs":[0]}
Get a 30 second chunk of raw audio.
curl ibm.sdr:8080/audio/99100000
curl ibm.sdr:8080/audio/99100000 | aplay -r 16000 -f S16_LE -t raw -c 1
If the SDR hardware is not present or can not be used for some reason you can curl the fake station at frequency 0, which will call out to BBC radio online.
curl ibm.sdr:8080/audio/0 | aplay -r 16000 -f S16_LE -t raw -c 1
If your device doesn't support the aplay command (ie Mac), you can also use the play command.
curl ibm.sdr:8080/audio/0 | play --rate 8000 --bits 16 --encoding signed-integer --channels 2 -t raw -