How to normalize audio input?
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Hello, does anybody know how wavrecord function scales PCM format (range 0-256 or 0-65536) into -1;1 interval? many thanks for answers
回答（3 个）
Daniel Shub
2013-5-24
1 个投票
The wavrecord function does not do the scaling but rather the recsnd function handles the scaling. The recsnd function is/was not a well defined entity since it was a platform dependent mex file and in some cases it used audiorecorder. The wavrecord function is now obsolete and is slated to be removed, so there is no single version...
That said, (x-128)/128 is probably a reasonable approximation of the conversion. Do you have reason to doubt this?
Antonio Ferreras
2019-10-22
0 个投票
The problem con mapminmax is that it introduces a continuus bias
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2019-10-22
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