implementing audio codecs

[aman_bajra]

The way we can implement different codecs while creating AVI files, is there anyway to compress audio files using audio codecs?

[Michelle_N]

aman_bajra,

What environment (LabVIEW, CVI, VB?) and hardware are you using?

[smercurio_fc]

There are many audio codecs, so your question needs to be narrowed down. Most codecs are libraries, so they will probably have an API. If the codec is implemented as a DLL then you can call it from LabVIEW. If it's implemented as just a library then you would need to create a wrapper DLL for LabVIEW to call it.

[aman_bajra]

Thanks for your reply. I am using LabVIEW 8.5 . My aim is to make an audio and video chat program. I am using wireless internet so I need to reduce the bandwidth as much as possible. I found that IMAQ AVI create supports built in codecs like Indigo but couldnt find any on audio. I found few command line codec(like for LPAC)  that could be potentially used but couldnt find any dll to do the same. Could anyone post the dll for audio compression like Vorbis(ogg).

Aman

[JeffOverton]

I don't have any of the codecs, but if you're trying to save bandwidth, a lossless format like ogg is not going to be your best friend.

[aman_bajra]

LPAC compresses the file by around half . Any codec either lossless or with loss would be welcome as long as it can help reduce the bandwidth usage.

Message Edited by aman_bajra on 06-12-2008 01:18 PM

[aman_bajra]

I saw a simillar question in expert exchange but it seems like you have to pay to get an answer. The question posted here is

http://www.experts-exchange.com/Software/Misc/Q_21493886.html

Hi,
I'm trying create a audio compression for wave files on labview, but need suggestions on any information online that can assist me with the audio compression,
or
anybody how knows how audio compression is applied.

[smercurio_fc]

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@aman_bajra wrote:

I saw a simillar question in expert exchange but it seems like you have to pay to get an answer.

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Hint: Try using Google. (I can't say anymore in case I am accused of abetting in "potentially defrauding someone". 'Nuff said.

[aman_bajra]

I got the dll from the LAME website for compressing and decompressing the audio into mp3. I have the documentation for the dll and tried to use it using CIN but failed. There is a CPP file in the zip showing how to use the dll . There is a big struct and I am stuck at the first stage on how to use this struct and how to define type.

Any suggestion to move forward.

Aman

[aman_bajra]

I have attached the zip file of dll and the specification of the dll.

Message Edited by aman_bajra on 06-22-2008 11:55 AM