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Hi,<br><br>I want to make is a DSP module that improves the sound quality
of the sound coming from the laptop builtin speakers by applying DSP
(FIR/IIR filters). <br>I want to route all audio played back (from for
instance an offline WAV or MP3 file, from a movie, or streamed from the internet) to
pass through the <br>DSP plugin whenever headphones are NOT connected. When headphones are connected no processing should be applied. <br>I
want to place the DSP module as close to the hardware as possible to
make sure all audio is really routed through the DSP plugin so I always
can enjoy <br>the DSP improvements made to the sound. <br><br>Where should I place this module/DSP code? <br>- As a plugin to PulseAudio? <br>
- As a plugin to ALSA? <br>- As its own virtual sound card?<br>
- In the audio driver for my built-in sound card?<br>- As a kernel module? <br> <br>
I have tried loading the LADSPA-module using the module-ladspa-sink in PulseAudio but I am not sure this is the best solution. <br>I need to remove some limitations in module-ladspa-sink to get it working properly ( multichannel audio, only DSP processing for internal speakers).<br>
<br>
My requirements:<br>
1) Must be able to detect if headphones are connected<br>
2) Must be able to process stereo and multichannel (5.1/7.1) formats. I
need the multichannel formats to perform binaural downmixing to
stereo. <br>So it is important that I can receive multichannel audio and mix it down to stereo and output it to a stereo soundcard.<br><br>/Kim<br> </body>
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