Trevor,
There are indeed some specifics that are necessary for the current
software to work properly with wave files. The critical points are:
1. Sampling rate. For now this must be 48KHz (just like the running
software). This will hopefully change in the future as we will have
need of resampling code anyways for remoting aspects.
2. Format. We use floating point format. It is possible to use
integers, but a conversion would then be necessary and this is an extra
step when buffering the audio from the disk (or to the disk when
recording). We hope to eventually support this option for
recording/playback.
3. #Channels. Clearly we need a stereo (2 channel) stream in order for
both I and Q to playback correctly. This will not likely change.
Hope that helps. Let me know if you have anymore specific questions.
Eric Wachsmann KE5DTO
Trevor Smithers wrote:
I have an MP3 file (recorded from a TS850/DSP100 on very noisy 40m band) that I want
to convert to wav format so I can play it through the SDR . I've downloaded a copy of Acez
MP3/Wav converter from www.acezsoft.com and it appears to have successfully
converted the file.
However when I attempt to play it through the WAV form in either beta 1.3.4 or 1.2.0, I get
an "Unhandled exception - Conversion buffer overflow" message - there is a load of other
information that I can post if necessary.
The IK3MAC moonbounce and Aurora wav files play perfectly.
First question - is it possible to play converted files through an SDR that were not originally
recorded from an SDR, if you see what I mean.
Are there any specific settings I should use to produce an SDR friendly wav file. Current
conversion options in the Acez software are:
Format: Microsoft PCM
Freq: 44100 hertz
Channels: 2-stereo
Sample rate: 16 bit
Any advice appreciated please.
Trevor G0KTN
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