-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 2015-09-29 10:03, Tanu Kaskinen wrote: > On Tue, 2015-09-29 at 09:38 +0200, Mikhail Morfikov wrote: >> On 2015-09-28 15:51, Felipe Sateler wrote: >>> On 28 September 2015 at 10:43, Tanu Kaskinen <tanuk at iki.fi> wrote: >>>> On Mon, 2015-09-28 at 15:30 +0200, Mikhail Morfikov wrote: >>>>> A few days ago I found a module called module-ladspa-sink , >>>>> and it can be enabled by adding the following code to the >>>>> /etc/pulse/default.pa file: >>>>> >>>>> .ifexists module-ladspa-sink.so >>>>> .nofail >>>>> load-module module-ladspa-sink sink_name=compressor plugin=sc4m_1916 >>>>> label=sc4m control=1,1.5,401,-30,20,5,12 >>>>> .fail >>>>> .endif >>>>> >>>>> It works, but I was trying to figure out what exactly >>>>> control=1,1.5,401,-30,20,5,12 means. There's a link >>>>> (http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html#tth_sEc2.92), >>>>> where you can find some documentation on the sc4m_1916 plugin, >>>>> but actually I don't really know which of the values corresponds >>>>> to the specific options. In the link, there's 9 parameters, >>>>> and in the code above, there's 7 I think. >>>>> >>>>> Is there someone who could cast a little light on the control >>>>> numbers? >>>> >>>> module-ladspa-sink fails to load if you don't provide all parameters, >>>> so if it works, the plugin really has only 7 control parameters. I >>>> don't know how you then should map them to the documentation. There >>>> very likely is some handy little program somewhere that you could use >>>> to inspect the plugin, but the only one that I can mention off the top >>>> of my head is JACK Rack, but that obviously depends on JACK, and if you >>>> don't already use JACK, it can be a bit of a hassle to set it up. I'd >>>> expect there to be some simple command line ladspa plugin inspector >>>> program too that doesn't need any audio access. >>> >>> There is analyseplugin that is part of the ladspa sdk: >>> >>> % analyseplugin sc4m_1916 >>> >>> Plugin Name: "SC4 mono" >>> Plugin Label: "sc4m" >>> Plugin Unique ID: 1916 >>> Maker: "Steve Harris <steve at plugin.org.uk>" >>> Copyright: "GPL" >>> Must Run Real-Time: No >>> Has activate() Function: No >>> Has deactivate() Function: No >>> Has run_adding() Function: Yes >>> Environment: Normal or Hard Real-Time >>> Ports: "RMS/peak" input, control, 0 to 1, default 0 >>> "Attack time (ms)" input, control, 1.5 to 400, default 101.125 >>> "Release time (ms)" input, control, 2 to 800, default 401 >>> "Threshold level (dB)" input, control, -30 to 0, default 0 >>> "Ratio (1:n)" input, control, 1 to 20, default 1 >>> "Knee radius (dB)" input, control, 1 to 10, default 3.25 >>> "Makeup gain (dB)" input, control, 0 to 24, default 0 >>> "Amplitude (dB)" output, control, -40 to 12 >>> "Gain reduction (dB)" output, control, -24 to 0 >>> "Input" input, audio >>> "Output" output, audio >>> >> >> Thanks for the hint. I have one question though. Is there a tool that can >> tell what settings are applied to the plugin? In the log above, there's 7 ports >> that have to be set, that's why there's the default value. Also there's two other >> ports that weren't set anywhere, so I think they're not taken into consideration >> at all if they're not set in the control= option. > > The last two controls are outputs, so if the plugin host supports it > (PulseAudio doesn't), other plugins can use those last two controls as > inputs. You only set values for input controls, which is why you only > need to set 7 values. I get it now. Thanks! >> I just wanted to see whether >> the settings in control=1,1.5,401,-30,20,5,12 are properly set. Is there something >> like that? > > So you'd like to confirm that PulseAudio sets the values correctly? > There is an undocumented API to set and get the control values at > runtime. I don't want to document it here, sorry. I recommend you to > just trust that the controls are set to the values that you specify > when loading the module. > -----BEGIN PGP SIGNATURE----- iQIcBAEBCgAGBQJWClH+AAoJEM0EaBB3G2UgMQoQAJTZoXoAhzkMBVW7BoZV7BCV SIhGJyL2uTGyj4dKXv9NTcNtvSi5KHls6oI7yRHcaPV5YJmeP++JY8x5QUY1YQI5 vYl95jZLjIzDLmSKaPoxB0YJ4Uuux/FxItAYn4365/u1coVk/hPN4hE4IXiR+wI4 nbVhhYieAJoxOvdwjEKB5A2pveVx9GnqbDuAmoEaJaAbenBcQEb8QLcN/rO1C6kv Rjcl4UAmEJvJn5dOER4H8WGYtuwy/N0ZS1C2Kqxjpiy5mvkdA+TcuQ32DOqcKN/M 4uUtBHgyyq3L0mw8qMZJzfLKL8K05YxZXacj+y5aZhNGhfG8zYdQTvPjRpPbprxu WmRg06C0Le3O13X7Wbn6ffNcurrxIBrLFE8VpX8/azhSoiO3SJ9P1AOugOR+lKDK JN8sKr9ByAKtJRNV+5NRCB/hTG3YdmVkeUfx3Bw4VD/cBzu+7X/PiGkE/MeTeIFG UDkFUzhI8NIWNfZmF39Nqvu9npmCPoRnZMkIABy7tM9oPpROcDIcjRbbgLaOBwXD qDaHWD14aLDRHi9uA1UOYctiL/iq4jKalPVwOA+/3XJ/Vgmlvtse2i450bFL9vAR JLNF4avJJIJqQ700AtAmqIrdnDiUqum1+JedzZADlfK3adWvv57ehDiQl0TvaTF2 knL8DdYe5tds2brEBGxI =lSwL -----END PGP SIGNATURE-----
