A client wants to have 8 bit vox files for his phone tree. Everything I have only offers 4 bit. Maybe he's mistaken but I thought I'd check with the experts.
Thanks,
Bill
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A client wants to have 8 bit vox files for his phone tree. Everything I have only offers 4 bit. Maybe he's mistaken but I thought I'd check with the experts.
Thanks,
Bill
I've never been asked to encode to vox and don't really know anything about the format - but fwiw Awave Audio 10.2 (latest version) offers only 4bit for vox - with variations for ".vox" / ".vox-6k" / and ".vox-8k"
I don't know what the differences are between these - but perhaps your client was wanting the "8000Hz" option when he asked for 8bit.
Best regards,
Steve Berson
Steve,
That's what I was thinking. I sent the IVR stuff along with alternate low rez wave files, which he said he could use too. I'll wait to hear back from them.
Thanks,
Bill
Got curious so I looked it up on Wikipedia -
from http://en.wikipedia.org/wiki/VOX_(file_format) ->
So again - looks like he wants the sample rate to be 8kHz - as this seems to indicate 4-bit as the only depth for the format.Quote:
Dialogic ADPCM or VOX is an audio file format, optimized for storing digitized voice data at a low sampling rate. VOX files are most commonly found in telephony applications, as well as an occasional arcade redemption game.
Similar to other ADPCM (Adaptive Differential Pulse Code Modulation) formats, Dialogic ADPCM compresses audio data into a series of 4-bit samples. Dialogic ADPCM files can have a sampling rate of 6000 or 8000 samples per second, but 8000 samples per second (8000Hz) is more common. Unlike a WAV file, a VOX file does not contain a header to specify the encoding format or the sampling rate, so this information must be known in order to play the file. If not known, it is normally assumed that a VOX file is encoded with Dialogic ADPCM at a sampling rate of 8000Hz. It is possible that a VOX file may be encoded in a format other than Dialogic ADPCM, but this is not common.
Dialogic ADPCM is an open file format.
More info at http://www.salina.k-state.edu/facult...ogic_adpcm.pdf
Best regards,
Steve Berson
I had to deliver a ton of VOX files for a casino here in Vegas that updated their phone system. They specifically asked for 8000 Hz, 16-bit, mono VOX files. After much research, I discovered that Adobe Audition 3.0 has a "batch processing" function and Dialogic ADPCM VOX is one of the output options. In the resample tab, I was able to set it to his requested specs. After delivery, he said that the files were perfect.
Also, I found that it could do the specs you are looking for too.
I'd be glad to do a batch process on your files if you need. I have an FTP to upload the files.
--Dave
This is one of the reasons I keep the old Cool Edit 2000 around.
Thanks all! It seems 4 bit worked and on the monitors sounded like Stashu described :). I wonder why Sound Forge won't allow batch to 8 bit but will let you convert after the batch process?
On a similar note, the client has asked me to leave 1 second after the file ends. Are you other VOX'ers doing the same thing?
I create almost all files with .1 second of silence up front and .25 at the end. I've had both ends clipped by encoders and sloppy clients.
In this case, perhaps the system sometimes plays the files one right after another. Without the extra silence, it would sound like a butt splice.
Thanks Ian,
Usually when a client says 1 second, they just want a breath. I shouldn't take them so literally. Maybe in the future, I'll judge by the phrase.