Can anyone advise if the following way of taking measurement correct? >From the instrution in Inguz website, 1. Play the Pink Noise file 2. Adjust the amplifer volume to a reaonably loud level. 3. Adjust each audio interface gain so that both channels do not go above the -6dB mark in Audacity. 4. If the microphone is connected to the Left channel of audio interface and Line In to the Right channel of audio interface, I have to turn up the Right channel to the maximum gain to get close to -6dB mark on Audacity. The gain on the Left channel is at about 1/3 of the maximum gain to achieve -6dB mark. 5. Play the Sweep file. 6. The loudest level on the Right channel of the audio interface hits the top and bottom of the range on Audacity. Inguz's instruction talks about adjusting pre-amp gain. I presume it is the adjustment of audio interface gain, not amplifer volume. Is that correct?
When adjusting the Right channel gain of the audio interface, should the gain be adjusted so that the peak level is below the top and bottom of the range or -6dB mark? The Left channel gain should be left untouched? Does it look right below? [image: http://i135.photobucket.com/albums/q142/dophlin/signal.jpg] Sample cut of the prep.log Exec DRC for normal.drc, left channel normal.drc --BCInFile left7_imp.pcm --BCInFileType F --BCImpulseCenter 384 --BCImpulseCenterMode M --MCOutFile left7_imp.tmp --MCOutFileType F --MCOutWindow 32768 --MCFilterLen 32768 --MCFilterType L --PSFilterType L --PSOutWindow 32768 --MSOutWindow 32768 Input configuration file: normal.drc Parsing configuration file... Parsing completed. Adding command line options... Configuration parameters check. Allocating input signal array. Reading input signal: left7_imp.pcm Input signal read. Input signal prewindowing. Input signal RMS level 3.252986 (10.245644 dB). Allocating homomorphic deconvolution arrays. Homomorphic deconvolution stage... Minimum phase component normalization. Excess phase component normalization. Allocating minimum phase component prefiltering array. Minimum phase component single side sliding lowpass prefiltering. Input signal prewindowing. Exec DRC for normal.drc, right channel normal.drc --BCInFile right6_imp.pcm --BCInFileType F --BCImpulseCenter 387 --BCImpulseCenterMode M --MCOutFile right6_imp.tmp --MCOutFileType F --MCOutWindow 32768 --MCFilterLen 32768 --MCFilterType L --PSFilterType L --PSOutWindow 32768 --MSOutWindow 32768 Input configuration file: normal.drc Parsing configuration file... Parsing completed. Adding command line options... Configuration parameters check. Allocating input signal array. Reading input signal: right6_imp.pcm Input signal read. Input signal prewindowing. Input signal RMS level 3.638982 (11.219598 dB). Allocating homomorphic deconvolution arrays. Homomorphic deconvolution stage... Minimum phase component normalization. Excess phase component normalization. Allocating minimum phase component prefiltering array. Minimum phase component single side sliding lowpass prefiltering. Input signal prewindowing. Final allpass convolution... Ringing truncation final windowing. Counting target response definition file points: bk-3-spline.txt Target response definition file points: 11 Allocating target response arrays. Reading target response definition file: bk-3-spline.txt Allocating target filter arrays. FIR Filter computation... Target response FIR Filter convolution... Target response signal windowing. Target response signal normalization. Saving Target response signal: rps.pcm Counting mic compensation definition file points: ecm8000.txt Mic compensation definition file points: 126 Allocating mic compensation filter arrays. Reading mic compensation definition file: ecm8000.txt Allocating mic compensation filter arrays. Mic compensation FIR Filter computation... Mic compensation FIR Filter convolution... Mic compensated signal windowing. Mic compensated signal normalization. Saving mic compensated signal: right6_imp.tmp Allocating test convolution arrays. Convolving input signal with target response signal... Filtered signal RMS level 2.973018 (9.463951 dB). Test convolution signal normalization. Saving test convolution signal: rtc.pcm Execution completed. Total computing time: 14 s -- cheetah ------------------------------------------------------------------------ cheetah's Profile: http://forums.slimdevices.com/member.php?userid=7231 View this thread: http://forums.slimdevices.com/showthread.php?t=26005 _______________________________________________ plugins mailing list plugins@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/plugins
