Plum IVR Support

I have a problem to save and open recorded messages as a wav file.

When i try to open the saved file i get an error that format is not

correct. I use type='audio/x-wav' in <record> tag and save all

input stream as a wav file.



-----------------------------VxmlSaveAnswers.aspx.cs-------------------

StreamReader sr = new StreamReader(Request.InputStream);

string wavFile = sr.ReadToEnd();

byte[] ba = HttpUtility.UrlDecodeToBytes(wavFile);

FileStream fs = new FileStream(filePath, FileMode.CreateNew);

BinaryWriter bw = new BinaryWriter(fs);

bw.Write(ba);

bw.Flush();

fs.Close();

Vlad:

More information is needed. Please elaborate on the IVR error you are encountering. Is it a vxml error that you are pulling from the IVR lastlog field on the hosted IVR site? Is it an IVR error in the asp page?

I'm not an expert on asp, most of our engineers here use php or jsp for serverside processing. It strikes me that you never reference the HTTP POST variable named "description1", unless you neglected to post in that part of your asp page. That's where the audio data is stored.

Post back with more details please.

Plum Support

Thank you for response.
I have succeed to save wav file on the server.
The problem is that i can't to open this file with Media Player.
I checked this file with hex editor and discovered that there are
some information was wroten before the header (before RIFF)
and chunk's size is not correct. After i changed this file in hex editor
i succeed to open it with Media Player.
So the question is i get not correct stream from PLUM or i must to
work with this stream for convert it to wav format?

Hi Vlad:


The reason it won't work by default is due to the fact that the audio file returned by the <record> tag is stored in headerless PCM, you'll have to apply a conversion to this to get into wav format. Our IVR engineers here use a utility called sox to do the conversion. A sample is in order:
The preceding code takes a raw pcm file uploaded to /tmp, and turns it into an 8khz, 8 bit wav file

If you already have an audio conversion tool you can use that,
or you can use sox for windows:
http://www.spies.com/Sox/

hope this helps!

Plum Support Team

OK.
But if i use record tag with type='x-wav' i get a file with header.
Which type i should use?

x-wav is fine for an audio format. You don't have to use sox; the IVR issue is that Windows

media player does not recognize ulaw. If you use a program that recognizes headerless ulaw

properly it will work (like cool edit or a similar program)

the sox command I supplied will make it playable in windows media player

cheers,

support

Hi.
sox make my file readable for Media Player but data was
corrupted... may be you now why?

Thank you.

Vlad:

I don't understand your last IVR post, can you please provide more information?

thanks,

support

sox command make my file playable in windows media player

but i don't hear the same information that i saved to file.

If you don't hear what you recorded, then what are you hearing? We need to know to better understand your IVR issue.

Only noise.

Could you send me a code example how you
save records as a wav file?

we can post an IVR code sample but it will be in php...is that ok?

Support

OK
Thanks.

What about code example?