Reverberation time calculation through API

[di1luan]

I am writing a Java program that needs to get the T20 reverberation time from a wav recording.
Is it possible to import the wav file to the api and get the resulting T20 times ?

 

[John Mulcahy]

If the WAV file is an impulse response you could import it via the API but there are no endpoints for retrieving RT60 data at the moment.

 

[di1luan]

Ok is that something that is in the pipeline? Maybe I could help you out ?

 

[John Mulcahy]

I'll get to it in the next few weeks.

 

[di1luan]

Great looking forward to it !

 

[John Mulcahy]

I've done it, will be in the next API beta.

 

[di1luan]

When will it be available?

 

[John Mulcahy]

End of the week.

 

[di1luan]

I see that you have included RT60 command. Great! But I am confused about the order to launch the commands, how to send the wav file to the api and get the answer is there a manual or java examples available ?

 

[John Mulcahy]

There's the help file. You can try out API calls using the SwaggerUI that is shown when you browse to localhost:4735 in any web browser (after starting the API). That also shows the format of the API messages and responses. The import features would first be used to import a WAV file as an impulse response, then POST a Generate RT60 command to the /measurements/{id}/command endpoint, where {id} is the index of the measurement whose RT60 data is to be generated, e.g. 1 for the first measurement. The results can be read from /measurements/{id}/rt60 endpoint. Python is probably a good choice of programming language for API access.

 

[di1luan]

Great thank you!

 

[John Mulcahy]

Note that generating the RT60 data takes time, so the response to the Generate RT60 command will be Accepted (202) rather than OK (200). You can poll /measurements/process-result to see when the command completes, or include a resultUrl in the command to have the results sent there when ready, but that would require you to run a server of your own.