Filtering audio in LabView

Hi,
I'm still working on my LabView project to obtain the numerical value of the peak frequency in a spectrum.
I'm using an example VI, and I've done some slight modification to it to learn how to implement filtering.
I've added a filter, but cannot seem to get it to make any difference in the output. I'd like to cut out the lower part of the spectrum.
If anyone has any advice as to why it is behaving as if I don't have a filter in at all, I would very much appreciate it.
Thanks,
Wes
Attachments:
Sound Card Spectrum Modified.vi ‏114 KB

nvaloor wrote:
Hi
I need to do the following
I have a audio file which has a person speaking and typing simultaneously.
What I need is to filter out the voice of the person and just get the keystroke sounds.
By analysing the sprectrum you can probably detect the key stroke, and use the spectrum before and after the stroke to estinate a filter to filter out the speaker during the stroke.
Look at the spectrogram.
Mono or stereo input? Using the phase information might help too.
Powerful algorythms have been created to do such tasks (ask the NSA ?? ) but a slightly similar task is the party-problem for hearing aids->multiple sound sources, where our brain (together with both ears) is able to filter out the sound (usually person) of interest, but people who wear hearing aids lost that feature. Search for puplications in the acustics fields.
Kalman-filters might do the job (Have fun )
Greetings from Germany
Henrik
LV since v3.1
“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'

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DataPlugin Load Audio File.vi ‏46 KB
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Attachments:
PlayCD.vi ‏22 KB

Hi,
It's useless to post 2 topics on the French and English forum for the same problem.
Somebody answers here, advicing to have a look on the web to find this kind of page
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Cordialement / Regards, Matthieu B. @ NI France.

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Tom Wolsky wrote:
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MPlayer SVN-r35107-4.7.2 (C) 2000-2012 MPlayer Team
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[mov,mp4,m4a,3gp,3g2,mj2 @ 0xeed4a0]first_dts 14 not matching first dts 0 in que
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xeed4a0]first_dts 14 not matching first dts 0 in que
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xeed4a0]first_dts 14 not matching first dts 0 in que
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xeed4a0]first_dts 14 not matching first dts 0 in que
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==> Found video stream: 0
======= VIDEO Format ======
biSize 79
biWidth 640
biHeight 360
biPlanes 0
biBitCount 24
biCompression 875967048='H264'
biSizeImage 691200
Unknown extra header dump: [1] [42] [c0] [1e] [ff] [e1] [0] [18] [67] [42] [c0] [1e] [da] [2] [80] [bf] [e5] [84] [0] [0] [3] [0] [4] [0] [0] [3] [0] [c0] [3c] [58] [ba] [80] [1] [0] [4] [68] [ce] [3c] [80]
===========================
[lavf] stream 0: video (h264), -vid 0
==> Found audio stream: 1
======= WAVE Format =======
Format Tag: 20557 (0x504D)
Channels: 2
Samplerate: 44100
avg byte/sec: 12021
Block align: 1
bits/sample: 16
cbSize: 16
Unknown extra header dump: [12] [10] [0] [0] [0] [0] [0] [0] [0] [0] [0] [0] [0] [0] [0] [0]
==========================================================================
[lavf] stream 1: audio (aac), -aid 0, -alang und
LAVF: 1 audio and 1 video streams found
LAVF: build 3545448
VIDEO: [H264] 640x360 24bpp 24.000 fps 562.6 kbps (68.7 kbyte/s)
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==========================================================================
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[dummy] Was reinitialized: 44100Hz/2ch/s16le
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[dummy] Was reinitialized: 44100Hz/2ch/s16le
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Unsupported PixelFormat 61
Unsupported PixelFormat 81
Unsupported PixelFormat 61
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Last edited by mellowmaroon (2013-04-14 05:26:07)

You were right about it being muted through the PA mixer! I didn't think about that, and installed pavucontrol. I figure I'll try to learn how to learn to do it through pactl/pacmd sometime.
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EDIT: Quickly found it! Haha I had "softvol=yes" in my config file, I think to try to increase the Alsa volume when I had that on. Thanks for your help anyway!
Last edited by mellowmaroon (2013-04-14 05:25:24)

FCP Filters not transfering to Motion

I'm working on a project in Final Cut, and I've just built a template in
motion that I want to use in FCP. I saved the motion project as a template, and thought it was working fine in FCP, but when I drag clips into the drop zones, it doesn't keep any of the filters (audio or video) that I've applied to the clips. For instance, if I have a clip that I want black and white, when I drag it into the Motion template, it comes out in color. Does anyone have any ideas?
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[SOLVED] .mkv audio issues after updating x264, ffmpeg and mplayer

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The problem was solved after downgrading back to the previous versions with:
pacman -U /var/cache/pacman/pkg/x264-20100312-1-i686.pkg.tar.xz
/var/cache/pacman/pkg/ffmpeg-22511-1-i686.pkg.tar.xz
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Last edited by dresb (2011-02-07 16:30:03)

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MPlayer SVN-r31029-4.4.3 (C) 2000-2010 MPlayer Team
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Compiled with runtime CPU detection.
get_path('codecs.conf') -> '/home/andres/.mplayer/codecs.conf'
Reading /home/andres/.mplayer/codecs.conf: Can't open '/home/andres/.mplayer/codecs.conf': No such file or directory
Reading /etc/mplayer/codecs.conf: 150 audio & 337 video codecs
Configuration: --prefix=/usr --enable-runtime-cpudetection --disable-gui --disable-arts --disable-liblzo --disable-speex --disable-openal --disable-fribidi --disable-libdv --disable-musepack --disable-esd --disable-mga --enable-xvmc --enable-liba52-internal --language=all --confdir=/etc/mplayer --extra-cflags=-fno-strict-aliasing
CommandLine: '-v' 'South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv'
init_freetype
Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay
get_path('fonts') -> '/home/andres/.mplayer/fonts'
Using nanosleep() timing
get_path('input.conf') -> '/home/andres/.mplayer/input.conf'
Can't open input config file /home/andres/.mplayer/input.conf: No such file or directory
Parsing input config file /etc/mplayer/input.conf
Input config file /etc/mplayer/input.conf parsed: 91 binds
Setting up LIRC support...
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
get_path('South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv.conf') -> '/home/andres/.mplayer/South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv.conf'
Playing South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv.
get_path('sub/') -> '/home/andres/.mplayer/sub/'
[file] File size is 41061991 bytes
STREAM: [file] South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv
STREAM: Description: File
STREAM: Author: Albeu
STREAM: Comment: based on the code from ??? (probably Arpi)
LAVF_check: Matroska file format
Checking for YUV4MPEG2
ASF_check: not ASF guid!
Checking for REAL
Checking for SMJPEG
[mkv] Found the head...
[mkv] + a segment...
[mkv] /---- [ parsing seek head ] ---------
[mkv] /---- [ parsing cues ] -----------
[mkv] \---- [ parsing cues ] -----------
[mkv] /---- [ parsing chapters ] ---------
[mkv] Chapter 0 from 00:00:00.097 to 00:00:00.000, 00:00:00.097
[mkv] \---- [ parsing chapters ] ---------
[mkv] \---- [ parsing seek head ] ---------
[mkv] |+ segment information...
[mkv] | + timecode scale: 1000000
[mkv] | + duration: 1305.942s
[mkv] |+ segment tracks...
[mkv] | + a track...
[mkv] | + Track number: 1
[mkv] | + Track type: Video
[mkv] | + Default flag: 1
[mkv] | + Codec ID: V_MPEG4/ISO/AVC
[mkv] | + CodecPrivate, length 40
[mkv] | + Default duration: 41.708ms ( = 23.976 fps)
[mkv] | + Language: und
[mkv] | + Video track
[mkv] | + Pixel width: 624
[mkv] | + Pixel height: 352
[mkv] | + Display width: 624
[mkv] | + Display height: 352
[mkv] | + a track...
[mkv] | + Track number: 2
[mkv] | + Track type: Audio
[mkv] | + Default flag: 1
[mkv] | + Codec ID: A_AAC
[mkv] | + CodecPrivate, length 7
[mkv] | + Default duration: 42.667ms ( = 23.438 fps)
[mkv] | + Language: und
[mkv] | + Audio track
[mkv] | + Sampling frequency: 24000.000000
[mkv] | + Channels: 2
[mkv] |+ found cluster, headers are parsed completely :)
==> Found video stream: 1
[mkv] Aspect: 1.772727
[mkv] Track ID 1: video (V_MPEG4/ISO/AVC), -vid 0
==> Found audio stream: 2
[mkv] Track ID 2: audio (A_AAC), -aid 0, -alang und
[mkv] Will play video track 1.
Matroska file format detected.
VIDEO: [avc1] 624x352 24bpp 23.976 fps 0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:31 fourcc:0x31637661 size:624x352 fps:23.976 ftime:=0.0417
get_path('sub/') -> '/home/andres/.mplayer/sub/'
X11 opening display: :0
vo: X11 color mask: FFFFFF (R:FF0000 G:FF00 B:FF)
vo: X11 running at 1280x800 with depth 24 and 32 bpp (":0" => local display)
[x11] Detected wm supports NetWM.
[x11] Detected wm supports FULLSCREEN state.
[x11] Detected wm supports ABOVE state.
[x11] Detected wm supports BELOW state.
[x11] Detected wm supports STAYS_ON_TOP state.
[x11] Current fstype setting honours FULLSCREEN STAYS_ON_TOP ABOVE BELOW X atoms
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
[vdpau] Error when calling vdp_device_create_x11: 1
[VO_XV] Using Xv Adapter #0 (Intel(R) Textured Video)
[xv common] Drawing no colorkey.
[xv common] Maximum source image dimensions: 2048x2048
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
INFO: libavcodec init OK!
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
dec_audio: Allocating 192000 + 65536 = 257536 bytes for output buffer.
FFmpeg's libavcodec audio codec
INFO: libavcodec "aac" init OK!
AUDIO: 24000 Hz, 2 ch, s16le, 128.0 kbit/16.67% (ratio: 16000->96000)
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
Building audio filter chain for 24000Hz/2ch/s16le -> 0Hz/0ch/??...
[libaf] Adding filter dummy
[dummy] Was reinitialized: 24000Hz/2ch/s16le
[dummy] Was reinitialized: 24000Hz/2ch/s16le
Trying every known audio driver...
ao2: 24000 Hz 2 chans s16le
audio_setup: using '/dev/dsp' dsp device
audio_setup: using '/dev/mixer' mixer device
audio_setup: using 'pcm' mixer device
[AO OSS] audio_setup: Can't open audio device /dev/dsp: Device or resource busy
alsa-init: requested format: 24000 Hz, 2 channels, 9
alsa-init: using ALSA 1.0.22
alsa-init: setup for 1/2 channel(s)
alsa-init: using device default
alsa-init: pcm opened in blocking mode
alsa-init: got buffersize=32768
alsa-init: got period size 1024
alsa: 48000 Hz/2 channels/4 bpf/32768 bytes buffer/Signed 16 bit Little Endian
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
AO: Description: ALSA-0.9.x-1.x audio output
AO: Author: Alex Beregszaszi, Zsolt Barat <[email protected]>
AO: Comment: under developement
Building audio filter chain for 24000Hz/2ch/s16le -> 48000Hz/2ch/s16le...
[dummy] Was reinitialized: 24000Hz/2ch/s16le
[libaf] Adding filter lavcresample
[dummy] Was reinitialized: 48000Hz/2ch/s16le
[dummy] Was reinitialized: 48000Hz/2ch/s16le
Starting playback...
[libaf] Reallocating memory in module lavcresample, old len = 0, new len = 36869
Increasing filtered audio buffer size from 0 to 36800
[h264 @ 0x8a214e0]no picture
[ffmpeg] aspect_ratio: 1.772727
VDec: vo config request - 624 x 352 (preferred colorspace: Planar YV12)
Trying filter chain: vo
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.77:1 - prescaling to correct movie aspect.
VO Config (624x352->624x352,flags=0,'MPlayer',0x32315659)
VO: [xv] 624x352 => 624x352 Planar YV12
VO: Description: X11/Xv
VO: Author: Gerd Knorr <[email protected]> and others
Xvideo image format: 0x32595559 (YUY2) packed
Xvideo image format: 0x32315659 (YV12) planar
Xvideo image format: 0x30323449 (I420) planar
Xvideo image format: 0x59565955 (UYVY) packed
Xvideo image format: 0x434d5658 (XVMC) planar
using Xvideo port 96 for hw scaling
*** [vo] Exporting mp_image_t, 624x352x12bpp YUV planar, 329472 bytes
Unicode font: 5025 glyphs.
Unicode font: 5025 glyphs.
Increasing filtered audio buffer size from 36800 to 36864 1.7% 4 0
[h264 @ 0x8a214e0]no picture
A: 82.0 V: 93.5 A-V:-11.550 ct: -2.541 0/ 0 6% 1% 1.8% 0 0
The previous versions:
MPlayer SVN-r30886-4.4.3 (C) 2000-2010 MPlayer Team
CPU vendor name: GenuineIntel max cpuid level: 10
CPU: Genuine Intel(R) CPU T2080 @ 1.73GHz (Family: 6, Model: 14, Stepping: 12)
extended cpuid-level: 8
extended cache-info: 67125312
Detected cache-line size is 64 bytes
Testing OS support for SSE... yes.
Tests of OS support for SSE passed.
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNowExt: 0 SSE: 1 SSE2: 1 SSSE3: 0
Compiled with runtime CPU detection.
get_path('codecs.conf') -> '/home/andres/.mplayer/codecs.conf'
Reading /home/andres/.mplayer/codecs.conf: Can't open '/home/andres/.mplayer/codecs.conf': No such file or directory
Reading /etc/mplayer/codecs.conf: 150 audio & 335 video codecs
Configuration: --prefix=/usr --enable-runtime-cpudetection --disable-gui --disable-arts --disable-liblzo --disable-speex --disable-openal --disable-fribidi --disable-libdv --disable-musepack --disable-esd --disable-mga --enable-xvmc --enable-liba52-internal --language=all --confdir=/etc/mplayer --extra-cflags=-fno-strict-aliasing
CommandLine: '-v' 'South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv'
init_freetype
Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay
get_path('fonts') -> '/home/andres/.mplayer/fonts'
Using nanosleep() timing
get_path('input.conf') -> '/home/andres/.mplayer/input.conf'
Can't open input config file /home/andres/.mplayer/input.conf: No such file or directory
Parsing input config file /etc/mplayer/input.conf
Input config file /etc/mplayer/input.conf parsed: 90 binds
Setting up LIRC support...
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
get_path('South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv.conf') -> '/home/andres/.mplayer/South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv.conf'
Playing South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv.
get_path('sub/') -> '/home/andres/.mplayer/sub/'
[file] File size is 41061991 bytes
STREAM: [file] South.Park.S14E04.You.Have.0.Friends.HDTV.XviD-FQM-muxed.mkv
STREAM: Description: File
STREAM: Author: Albeu
STREAM: Comment: based on the code from ??? (probably Arpi)
LAVF_check: Matroska file format
Checking for YUV4MPEG2
ASF_check: not ASF guid!
Checking for REAL
Checking for SMJPEG
[mkv] Found the head...
[mkv] + a segment...
[mkv] /---- [ parsing seek head ] ---------
[mkv] /---- [ parsing cues ] -----------
[mkv] \---- [ parsing cues ] -----------
[mkv] /---- [ parsing chapters ] ---------
[mkv] Chapter 0 from 00:00:00.097 to 00:00:00.000, 00:00:00.097
[mkv] \---- [ parsing chapters ] ---------
[mkv] \---- [ parsing seek head ] ---------
[mkv] |+ segment information...
[mkv] | + timecode scale: 1000000
[mkv] | + duration: 1305.942s
[mkv] |+ segment tracks...
[mkv] | + a track...
[mkv] | + Track number: 1
[mkv] | + Track type: Video
[mkv] | + Default flag: 1
[mkv] | + Codec ID: V_MPEG4/ISO/AVC
[mkv] | + CodecPrivate, length 40
[mkv] | + Default duration: 41.708ms ( = 23.976 fps)
[mkv] | + Language: und
[mkv] | + Video track
[mkv] | + Pixel width: 624
[mkv] | + Pixel height: 352
[mkv] | + Display width: 624
[mkv] | + Display height: 352
[mkv] | + a track...
[mkv] | + Track number: 2
[mkv] | + Track type: Audio
[mkv] | + Default flag: 1
[mkv] | + Codec ID: A_AAC
[mkv] | + CodecPrivate, length 7
[mkv] | + Default duration: 42.667ms ( = 23.438 fps)
[mkv] | + Language: und
[mkv] | + Audio track
[mkv] | + Sampling frequency: 24000.000000
[mkv] | + Channels: 2
[mkv] |+ found cluster, headers are parsed completely :)
==> Found video stream: 1
[mkv] Aspect: 1.772727
[mkv] Track ID 1: video (V_MPEG4/ISO/AVC), -vid 0
==> Found audio stream: 2
[mkv] Track ID 2: audio (A_AAC), -aid 0, -alang und
[mkv] Will play video track 1.
Matroska file format detected.
VIDEO: [avc1] 624x352 24bpp 23.976 fps 0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:31 fourcc:0x31637661 size:624x352 fps:23.976 ftime:=0.0417
get_path('sub/') -> '/home/andres/.mplayer/sub/'
X11 opening display: :0
vo: X11 color mask: FFFFFF (R:FF0000 G:FF00 B:FF)
vo: X11 running at 1280x800 with depth 24 and 32 bpp (":0" => local display)
[x11] Detected wm supports NetWM.
[x11] Detected wm supports FULLSCREEN state.
[x11] Detected wm supports ABOVE state.
[x11] Detected wm supports BELOW state.
[x11] Detected wm supports STAYS_ON_TOP state.
[x11] Current fstype setting honours FULLSCREEN STAYS_ON_TOP ABOVE BELOW X atoms
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
[vdpau] Error when calling vdp_device_create_x11: 1
[VO_XV] Using Xv Adapter #0 (Intel(R) Textured Video)
[xv common] Drawing no colorkey.
[xv common] Maximum source image dimensions: 2048x2048
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
INFO: libavcodec init OK!
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
==========================================================================
Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding)
dec_audio: Allocating 6144 bytes for input buffer.
dec_audio: Allocating 65536 + 65536 = 131072 bytes for output buffer.
FAAD: Decoder init done (0Bytes)!
FAAD: Negotiated samplerate: 48000Hz channels: 2
FAAD: compressed input bitrate missing, assuming 128kbit/s!
AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio: 16000->192000)
Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
Building audio filter chain for 48000Hz/2ch/s16le -> 0Hz/0ch/??...
[libaf] Adding filter dummy
[dummy] Was reinitialized: 48000Hz/2ch/s16le
[dummy] Was reinitialized: 48000Hz/2ch/s16le
Trying every known audio driver...
ao2: 48000 Hz 2 chans s16le
audio_setup: using '/dev/dsp' dsp device
audio_setup: using '/dev/mixer' mixer device
audio_setup: using 'pcm' mixer device
[AO OSS] audio_setup: Can't open audio device /dev/dsp: Device or resource busy
alsa-init: requested format: 48000 Hz, 2 channels, 9
alsa-init: using ALSA 1.0.22
alsa-init: setup for 1/2 channel(s)
alsa-init: using device default
alsa-init: pcm opened in blocking mode
alsa-init: got buffersize=32768
alsa-init: got period size 1024
alsa: 48000 Hz/2 channels/4 bpf/32768 bytes buffer/Signed 16 bit Little Endian
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
AO: Description: ALSA-0.9.x-1.x audio output
AO: Author: Alex Beregszaszi, Zsolt Barat <[email protected]>
AO: Comment: under developement
Building audio filter chain for 48000Hz/2ch/s16le -> 48000Hz/2ch/s16le...
[dummy] Was reinitialized: 48000Hz/2ch/s16le
[dummy] Was reinitialized: 48000Hz/2ch/s16le
Starting playback...
Increasing filtered audio buffer size from 0 to 34816
[h264 @ 0x8a89bc0]no picture
[ffmpeg] aspect_ratio: 1.772727
VDec: vo config request - 624 x 352 (preferred colorspace: Planar YV12)
Trying filter chain: vo
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.77:1 - prescaling to correct movie aspect.
VO Config (624x352->624x352,flags=0,'MPlayer',0x32315659)
VO: [xv] 624x352 => 624x352 Planar YV12
VO: Description: X11/Xv
VO: Author: Gerd Knorr <[email protected]> and others
Xvideo image format: 0x32595559 (YUY2) packed
Xvideo image format: 0x32315659 (YV12) planar
Xvideo image format: 0x30323449 (I420) planar
Xvideo image format: 0x59565955 (UYVY) packed
Xvideo image format: 0x434d5658 (XVMC) planar
using Xvideo port 96 for hw scaling
*** [vo] Exporting mp_image_t, 624x352x12bpp YUV planar, 329472 bytes
Unicode font: 5025 glyphs.
Unicode font: 5025 glyphs.
[h264 @ 0x8a89bc0]no picture1 ct: 0.041 0/ 0 15% 3% 1.8% 4 0
EDIT: I've just seen your edit
Last edited by dresb (2010-04-14 21:03:59)

Filtering audio in LabView

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