Thank you! That worked. On Thu, Jul 21, 2011 at 11:32 AM, Tobias Leich <em...@froggs.de> wrote:
> Take a look at this:**** > > http://sdl.perl.org/SDL-Mixer-Effects.html#set_panning**** > > ** ** > > You have to register a penning effect, on both channels…**** > > ** ** > > This should work.**** > > ** ** > > Cheers,**** > > FROGGS**** > > ** ** > > *Von:* Anjali Menon [mailto:anjalimeno...@gmail.com] > *Gesendet:* Donnerstag, 21. Juli 2011 18:24 > *An:* em...@froggs.de > *Cc:* sdl-devel@perl.org > *Betreff:* Re: SDL::Mixer::Channels**** > > ** ** > > Hi, > > Yes I want to play sound first on the left and then on the right channel. > My desktop is hooked to a USB sound card with Left and right Line-in and > Line out options and that is the sound card I am using to play the sounds. I > modified the program to incorporate what you said but it still does not > work. > > > use SDL; > use SDL::Mixer; > use SDL::Mixer::Channels; > use SDL::Mixer::Samples; > > > > SDL::init(SDL_INIT_AUDIO); > SDL::Mixer::open_audio( 44100, AUDIO_U16SYS, 2, 4096 ); > SDL::Mixer::Channels::allocate_channels( 2 ); > SDL::Mixer::Channels::volume(0,0); > SDL::Mixer::Channels::volume(1,90); > my $chunk = SDL::Mixer::Samples::load_WAV('C:\1ksil1ch.wav'); > > SDL::Mixer::Channels::play_channel( 0, $chunk, 0 ); > > SDL::delay(10000); > SDL::Mixer::Channels::halt_channel( 0 ); > > > SDL::Mixer::Channels::play_channel( 1, $chunk, 0 ); > SDL::delay(10000); > > SDL::Mixer::close_audio(); > > > > I set the volume for both channels, left and right. I play the sound to the > left channel then i tried to halt the left channel and then played to the > right channel. What I saw was that the wav file played nothing to either > channel in the first case (when I said play to channel 0) and it played the > sound to both channels in the second case (when I said play to channel 1). > All the sounds I am playing are mono. > > I guess I can understand the issue coz the data is going serially to the > sound card and so I thought (before I saw the SDL documentation) that the > only way to control the output on the channels would be to adjust the > channel balance in the master volume. I am not sure what the scheme is that > you guys are using to control this. Anyway, do let me know if there is > anything i can do or if there is something fundamentally wrong about the way > I understand this. thanks, > > Anjali**** > > On Thu, Jul 21, 2011 at 5:09 AM, <em...@froggs.de> wrote:**** > > Hi, > > Channels are not bound to left or right. A channel is just a slot that lets > you play sound samples. And if you allocate two channels, you have channel 0 > and 1 (not 1 and 2), thats why you dont hear your last sample. > > You want to play sounds first on left and then on right box for example? > > Cheers, FROGGS > > Zitat von Anjali Menon <anjalimeno...@gmail.com>:**** > > Hi, > > I got done with installing SDL and I wrote a simple program that opens the > audio device allocates both channels to the mixer, sets the volume of one > of > the channels to be 0 , loads a wav file and then plays it twice one after > another with a delay in between. I have pasted the code below. > > use SDL; > use SDL::Mixer; > use SDL::Mixer::Channels; > use SDL::Mixer::Samples; > > > > SDL::init(SDL_INIT_AUDIO); > SDL::Mixer::open_audio( 44100, AUDIO_S16, 2, 4096 ); > SDL::Mixer::Channels::allocate_channels( 2 ); > SDL::Mixer::Channels::volume(1,0); > my $chunk = SDL::Mixer::Samples::load_WAV('C:\1ksil1ch.wav'); > > SDL::Mixer::Channels::play_channel( 1, $chunk, 0 ); > > SDL::delay(10000); > SDL::Mixer::Channels::halt_channel( 1 ); > > > SDL::Mixer::Channels::play_channel( 2, $chunk, 0 ); > SDL::delay(10000); > > SDL::Mixer::close_audio(); > > > The questions I have are: > 1) When you say channel, do you mean one set of Left and Right Channels. > This is because I saw then in this case, for the first condition of > play_channel (when it was supposed to play to channel 1), it played the > wave > file in both the right and left channel and in the second case (when it was > supposed to play to channel 2) there was no sound on either channels. Is > there a way for me to access the left and right channel separately? > > 2)Also, I played another sound file which was just an instance of a person > saying the syllable "ta" and when i played that file using these settings, > the pitch of the sound changed. I noticed that when I increased the > sampling > frequency from 44100 to 154100, was when the sound was the correct pitch. > How is this happening? Is it something I am doing? > > I hope you can help, > > Thanks > > On Wed, Jul 20, 2011 at 2:08 PM, Anjali Menon <anjalimeno...@gmail.com > >wrote:**** > > Thanks Kartik > > > On Wed, Jul 20, 2011 at 12:03 PM, Kartik Thakore <thakore.kar...@gmail.com > > wrote:**** > > To work with perl, I suggest you learn CPAN. It is how all this will > be installed for you. > > cpan SDL > > Should work. If you have trouble just bug us at sdl-devel@perl.org . > Also when replying to these threads CC sdl-devel@perl.org > > On Wed, Jul 20, 2011 at 11:35 AM, Anjali Menon <anjalimeno...@gmail.com> > wrote: > > At differing times yes but with an overlap. That was what most others > could > > not do. There is nothing in the docs for SDL::Mixer that say that it > cannot > > be done so I guess I'll just have to try it. Also, is there any way of > > installing this without getting git. Even if there is an older version > I'm > > ok with it if you could point me to it. I'm sorry for so many questions. > > I've never worked with perl before and there is something I need to get > done > > really fast thus the hurry. Thank you, > > > > Anjali > > > > On Wed, Jul 20, 2011 at 6:16 AM, My <thakore.kar...@gmail.com> wrote: > >> > >> This should be possible. Just to be clear you want to play different > wavs > >> on different channels at differing times. Right? Have you read the > >> SDL::Mixer::* docs? Is anything unclear? > >> > >> Kartik Thakore > >> > >> On 2011-07-20, at 3:45 AM, Anjali Menon <anjalimeno...@gmail.com> > wrote: > >> > >> > Hi Kartik, > >> > > >> > I have been going through the SDL::Mixer installation files and I had > >> > several questions about that. I am trying to write a program that > will play > >> > a certain wav file in one channel and somewhere in the middle of that > file > >> > it'll start playing another wav file in the other channel. Firstly, > is is > >> > possible with the SDL::Mixer::Channels extension to run two instances > of a > >> > player independent of eachother. I tried Win32::MediaPlayer and > Win32::Sound > >> > and both of them will stop a file that is currently playing if they > are > >> > given another play command. Can you tell me if SDL_Mixer can do this? > Thanks > >> > a lot for your help, > >> > > >> > Anjali > > > >**** > > ** ** > > ** ** > > ** ** > > ** ** >
