Can't compile newfx branch

[kraxarn]

I wanted to try to compile the newfx branch to try out the new effects, but get the following error while trying to compile it

main.o: In function ckb_init': /home/kraxarn/Downloads/ckb-newfx/src/ckb-mviz/main.c:51: undefined reference topa_simple_new' main.o: In function getFreqDec': /home/kraxarn/Downloads/ckb-newfx/src/ckb-mviz/main.c:93: undefined reference topa_simple_read' collect2: error: ld returned 1 exit status make[1]: * [../../bin/ckb-animations/ckb-mviz] Error 1 make: * [sub-src-ckb-mviz-make_first] Error 2 make: *\ Waiting for unfinished jobs....

It seems something is wrong with the required libpulse-simple, which is replaced by libpulse-dev in Ubuntu 15.04, which is installed and updated. I also just tried reinstalling the package, but it still gives off the same error. I also tried manually going into the ckb-mviz folder and tried to jump compile that without luck.

[tatokis]

From a quick look I had, if you edit the generated makefile inside ckb/src/ckb-mviz/ and change line 175 to

$(LINK)  -o $(TARGET) $(OBJECTS) $(OBJCOMP) $(LIBS) $(LFLAGS)

and then run make manually on that directory it seems to compile without any issues. It calls g++ with the -lpulse-simple argument after the .o files

g++  -o ../../bin/ckb-animations/ckb-mviz main.o kiss_fft.o kiss_fftr.o     -m64 -lpulse-simple

[ccMSC]

You're probably missing the pulseaudio development libraries. It's meant to be an optional dependency (won't be used on OSX at all), which is why I put it into a different branch for now.

I've updated the branch to something that should allow the project to compile without Pulse. The visualizer should simply be skipped if the library isn't available.

[tatokis]

I am also on 15.04, and I had the exact same issue when I tried it. I do have the library installed as I can compile my own application and link against it. Don't really think the problem is that the library does not exist.

[ccMSC]

@ruler501 any idea what's going on here? It compiles fine on my system (Arch), seems really odd that it would fail to link if the library's installed correctly.

I would have assumed that there was some package missing, but if you were able to compile a different application with it then that seems unlikely.

[tatokis]

@ccMSC Have a look at this https://vps.tasossah.com/misc/ckb-libpulse.webm

[JackFarrand]

it compiles and runs cleanly on fedora 23, but doesn't respond to any playing music, using either the power or magnitude presets. Any ideas on how to debug?

Edit: Seems that ckb-mviz/main.c uses only the default variables [NULL] for the pulseaudio sink, the dev variable here :

pa_simple* pa_simple_new    (   const char *    server,
const char *    name,
pa_stream_direction_t   dir,
const char *    dev,
const char *    stream_name,
const pa_sample_spec *  ss,
const pa_channel_map *  map,
const pa_buffer_attr *  attr,
int *   error 
)   

So depending on what pulse specifies as the default sink (could be a microphone as in my case), the PulseAudio server will only provide data for that sink. Do we have a way of selecting a device, as in does CKB support dropdown box variables?

Will look into it tonight.

[kraxarn]

I have since then switched to OpenSUSE where it also compiles just fine.

I later opened up pavucontrol and there was a new entry under "Recording". I changed that to a monitor of my sound card and it now works fine :D

But it seems to act a bit weird though, it seems like it's horizontal instead of vertical... Also, when no audio is playing, the whole keyboard just lights up white, which is kinda annoying...

[JackFarrand]

Thanks for the info!

Aye, tuning / changing the gradient for the function should fix the white-out. Perhaps I should commit a 'how to' section to this branch's Readme.md for others to get this working.

[SicVolo]

@JackFarrand Could you post a comment here on how you got it working?

[JackFarrand]

@SicVolo as KraXarN said, run pavucontrol in a terminal and look for the recording device and change the input to a monitor of your chosen sound output, the keyboard then responds properly. The white-out issue can be fixed by changing the blending settings of the music effect.