Create a sine wave audio tone - Linux

[Aruna]

Compiles and runs, still no sound :-( Please see the attached screenshot

If frequency is 5 Hz indeed, you cannot hear it. 

True, but I would have thought even at 1Hz you should be able to hear it as a click on a metronome. I just made a screencast please watch till the end, the problem is fully captured here. It is 3 minutes but shows you the issue clearly. My first language is not English so my apologies for the accent :-)

[Fred vS]

Hello Aruna.
Thanks for the video. 

Here a other from my system:
https://github.com/fredvs/test/releases/download/fpc323/sinewave_with_sound.mp4

Did you copy Portaudio library in the root directory of /sinewave_with_sound/, like in my video?

[Aruna]

Did you copy Portaudio library in the root directory of /sinewave_with_sound/, like in my video?

Yes I did. Screenshot attached.

[Fred vS]

Hum... 
Do you have "audacity" app installed, is it working?

In lot of Linux distros, Portaudio is installed by default.
You can try using portaudio installed on the system by changing:

Code: Pascal  [Select][+][-]

1.  {$if defined(CPUAMD64) and  defined(linux) }
2.    // PA_FileName := ordir + 'lib/Linux/64bit/LibPortaudio-64.so';
3.         PA_FileName := ordir + 'LibPortaudio-64.so';
4.  {$ENDIF}

   

with this:

Code: Pascal  [Select][+][-]

1.  {$if defined(CPUAMD64) and  defined(linux) }
2.    // PA_FileName := ordir + 'lib/Linux/64bit/LibPortaudio-64.so';
3.         PA_FileName := 'system';
4.  {$ENDIF}    

To install portaudio on your system (or check if installed):

Code: Pascal  [Select][+][-]

1. $ sudo apt-get install libportaudio2

[Aruna]

Hello @Fred vS the last *.zip file you sent worked. The sine wave note sounds so clear and pure (wow). Quick question about UOS, if I wanted to play an internet radio stream can UOS handle that? For anyone interested the working zip file is HERE.

[Fred vS]

Hello @Fred vS the last *.zip file you sent worked. The sine wave note sounds so clear and pure (wow).

I am very happy that it works for you. 

Quick question about UOS, if I wanted to play an internet radio stream can UOS handle that?

Yes, of course, take a look at /uos/examples/conswebstream.lpi and /uos/examples/simplewebplayer.lpi
Note that the radio-sites url in the examples are old, not sure they still exist.

[Aruna]

Quick question about UOS, if I wanted to play an internet radio stream can UOS handle that?

Yes, of course, take a look at /uos/examples/conswebstream.lpi and /uos/examples/simplewebplayer.lpi
Note that the radio-sites url in the examples are old, not sure they still exist.

Great! I will replace the url's if they no longer exist.

@Fred vS You had posted a *.mp4 file somewhere earlier in this thread that shows you testing the code on your system. I am unable to locate this any longer. Woudl you please post it again if you do not mind? I had some questions for you on the distro and some other things I saw. Thank you very much once again for all your help and time.

[Fred vS]

Great! I will replace the url's if they no longer exist.

This one is working, just tested:
http://stream-uk1.radioparadise.com/mp3-128
Note that the demo conswebstream.lpi must be run via a terminal (because you need to enter keys).

@Fred vS You had posted a *.mp4 file somewhere earlier in this thread that shows you testing the code on your system. I am unable to locate this any longer.

This one ?
https://github.com/fredvs/test/releases/download/fpc323/sinewave_with_sound.mp4

[Aruna]

This one is working, just tested:
http://stream-uk1.radioparadise.com/mp3-128

Yes it does I just tested as well.

Note that the demo conswebstream.lpi must be run via a terminal (because you need to enter keys).

Noted and understood. Thank you!

@Fred vS You had posted a *.mp4 file somewhere earlier in this thread that shows you testing the code on your system. I am unable to locate this any longer.

This one ?

https://github.com/fredvs/test/releases/download/fpc323/sinewave_with_sound.mp4

Yes!

[Aruna]

Quick question about UOS, if I wanted to play an internet radio stream can UOS handle that?

Yes, of course, take a look at /uos/examples/conswebstream.lpi and /uos/examples/simplewebplayer.lpi
Note that the radio-sites url in the examples are old, not sure they still exist.

Hello @Fred vS I tried the simplewebplayer.lpi and it does work. I had to enable the SoundTouch plugin and then it started playing very clear sound. I have a question, some url's work and others do not. Do you know why is this? Please have a look at the attached screenshots.

The urls I tried are below:
http://cast5.magicstreams.gr:8010/stream ( This plays once you enable Sound Touch)
https://radio.lotustechnologieslk.net:2020/stream/hirufmgarden ( This does not play )
(Try plugging in both urls in your browser and both will play.)

Very nice work by the way!

[Fred vS]

Hello Aruna

The urls I tried are below:
http://cast5.magicstreams.gr:8010/stream ( This plays once you enable Sound Touch)

Hum, very strange, here it works with or without SoundTouch.
Maybe a problem of latency?
Try to change in main_wsp.pas, line 362, this code:
 

Code: Pascal  [Select][+][-]

1.      {$else}
2.        Out1Index := uos_AddIntoDevOut(PlayerIndex1, -1, -1, uos_InputGetSampleRate(PlayerIndex1, In1Index),
3.        ...
4.       {$endif}    

with this

Code: Pascal  [Select][+][-]

1.      {$else}
2.        Out1Index := uos_AddIntoDevOut(PlayerIndex1, -1, 0.8, uos_InputGetSampleRate(PlayerIndex1, In1Index),
3.        ...
4.       {$endif}    

The urls I tried are below:
https://radio.lotustechnologieslk.net:2020/stream/hirufmgarden ( This does not play )

Indeed, here it does not work too.
Maybe it is because https:// (secured url).
Sadly I dont have much skin in fphttpclient.pas, maybe there is something to do to access https.   

Very nice work by the way!

Thanks! 

[Fred vS]

https://radio.lotustechnologieslk.net:2020/stream/hirufmgarden ( This does not play )

Hello Aruna.
Could you try with the last commit of uos ? :
https://github.com/fredvs/uos

It should be fixed.
Thanks to note it.

[Fred vS]

Re-hello.
Note that playing https url will work only with fpc 3.3.1.
I did try using fpc 322 but it did not work. 

[Aruna]

https://radio.lotustechnologieslk.net:2020/stream/hirufmgarden ( This does not play )

Hello Aruna.
Could you try with the last commit of uos ? :
https://github.com/fredvs/uos

It should be fixed.
Thanks to note it.

I just tried it and everything works. Thank you for taking the time. Please see the attached screenshot. @Fred vS when I load your project into my Lazarus IDE it pops up a second source editor. Why is this happening? It does not get in my way or prevent me from writing code or buidling I am just curious as to why this happens?

[Fred vS]

I just tried it and everything works.

Ha, excellent news, I am very happy all is ok now. 

@Fred vS when I load your project into my Lazarus IDE it pops up a second source editor. Why is this happening? It does not get in my way or prevent me from writing code or buidling I am just curious as to why this happens?

Sorry but I not expert about Lazarus IDE and cannot reproduce it.
Maybe create a new topic and ask it there.

Have nice days.

Fre;D