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Problem with Wav Recording App and Audio App under Vista
Started by billr, Jan 11 2010 10:24 PM
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#1
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Posted 11 January 2010 - 10:24 PM
I was able to get the audio Applet working. However, there is a large amount of
#2
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Posted 15 January 2010 - 02:46 PM
1st problem - "hiss"
I discovered that Wav Recording Applet recorded audio with 16 bits per sample.
New Audio Recording Applet recorded audio with 8 bits per sample.
I am sure, main reason of "hiss" is 8 bit per sample recording.
To record audio by Audio Recording Applet with 16 bits per sample , please change in the "audio_format" applet parameters its value to "pcm_16"
Also, this applet can record audio in "aLaw" and "muLaw" formats. Please try it. The advantage of this formats - the audio quality almost the same as PCM 16 bits, but file size is 2 time less them PCM with 16 bits per sample.
It is because "aLaw" and "muLaw" formats use 8 bits pers sample.
2nd problem - no audio file upload on the Vista.
Probably, this problem related to Vista network permissions.
Applet uploads audio file on the server in the following way:
applet divides audio file on a few portions and upload them portion by portion via HTTP. Server script receives audio file on the server and save them there. After receiving of each portion, the server script sends message ACCEPTED to the applet. Applet receives this message and uploads next portion. I hope the understanding of uploading process will help you to fix the problem with uploading.
I discovered that Wav Recording Applet recorded audio with 16 bits per sample.
New Audio Recording Applet recorded audio with 8 bits per sample.
I am sure, main reason of "hiss" is 8 bit per sample recording.
To record audio by Audio Recording Applet with 16 bits per sample , please change in the "audio_format" applet parameters its value to "pcm_16"
Also, this applet can record audio in "aLaw" and "muLaw" formats. Please try it. The advantage of this formats - the audio quality almost the same as PCM 16 bits, but file size is 2 time less them PCM with 16 bits per sample.
It is because "aLaw" and "muLaw" formats use 8 bits pers sample.
2nd problem - no audio file upload on the Vista.
Probably, this problem related to Vista network permissions.
Applet uploads audio file on the server in the following way:
applet divides audio file on a few portions and upload them portion by portion via HTTP. Server script receives audio file on the server and save them there. After receiving of each portion, the server script sends message ACCEPTED to the applet. Applet receives this message and uploads next portion. I hope the understanding of uploading process will help you to fix the problem with uploading.
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