search for: ad1836

...s) to the encoder and displaying the decoder output in addition to recording the audio. The ALSA functionality that I am using to receive and transmit audio is not introducing the problem as it works correctly when I remove Speex. The problem occurs both on the Blackfin 537 Stamp board with the AD1836 audio daughter card and with our own 537 hardware. The build configuration settings that I am using are as follows: --without-ogg --without-ogg-libraries --without-ogg-includes --disable-oggtest --enable-blackfin-asm --enable-fixed-point --disable-float-api --disab...

Hi Masakazu, I have reproduced the Speex high frequency noise issue on a Blackfin 537 by sending 'silence' into the Speex fixed point encoder. By recording the Speex decoder output and plotting the spectrum using Audacity the following two frequencies. 1596Hz at -31.3dB 3200Hz at -48dB These two frequencies are present in both Narrow Band and Wide Band modes. I've tried a number

Hi Jean-Marc, after some problems with getting svn to work here I finally made it. Problem is, you write that I cannot use libspeex and libspeexdsp at the same time now -- because I use a "live" system (mic-in -> speex_enc -> speex_dec -> headphone out) and I can run the AD1836 audio codec on 48 kHz only, I cannot use my program now (because I use speex resampling...) So I tried to do file I/O, but the described problem (that the encoder corrupts its input buffer) is gone in this configuration. But nevertheless, when I try to encode an overdriven (saturated) signal, the...

...> after some problems with getting svn to work here I finally made it. > Problem is, you write that I cannot use libspeex and libspeexdsp at > the same time now -- because I use a "live" system (mic-in -> > speex_enc -> speex_dec -> headphone out) and I can run the AD1836 > audio codec on 48 kHz only, I cannot use my program now (because I > use speex resampling...) Well, you can't use libspeex and libspeexdsp together *only if* you enable fixed-point debugging. I'll fix that when I get some time. > So I tried to do file I/O, but the described p...