Starting All Audio At The Same Moment

yusufozk · March 27, 2013, 8:10pm

Hello,

I have more than 10 audio channels which should start playing at the same time.

How can I start all channels start playing at the same time?

Thanks.

yusufozk · March 27, 2013, 11:25pm

Hi, again.

I see that there is a function in openAL, “allSourcePlayv”, which plays a set of sources.

Is there a way to use this function.

Thanks.

yusufozk · March 29, 2013, 11:13am

No idea?

BeyondtheTech · March 29, 2013, 2:03pm

All the available, undocumented OpenAL functions in Corona can be found here. Anything additional would probably require someone creating a Gluon plug-in, or done directly with Objective-C and implemented through Corona Enterprise.

http://www.coronalabs.com/blog/2011/07/27/the-secretundocumented-audio-apis-in-corona-sdk/

yusufozk · March 27, 2013, 11:25pm

Hi, again.

I see that there is a function in openAL, “allSourcePlayv”, which plays a set of sources.

Is there a way to use this function.

Thanks.

yusufozk · March 29, 2013, 11:13am

No idea?

BeyondtheTech · March 29, 2013, 2:03pm

All the available, undocumented OpenAL functions in Corona can be found here. Anything additional would probably require someone creating a Gluon plug-in, or done directly with Objective-C and implemented through Corona Enterprise.

http://www.coronalabs.com/blog/2011/07/27/the-secretundocumented-audio-apis-in-corona-sdk/

ilparola · May 10, 2013, 2:47pm

Hi, i’m developing a drum machine and i face your same problem. if you do audio.play(sound1) audio.play(sound2) etc… they will start with an unimportant delay. Try it!

bjsorrentino · May 10, 2013, 5:30pm

Hi @ilparola,

I assume you’ve loaded all of these sounds in advance and stored them somewhere easily accessible to Lua and the audio system? If so, how about “playing” them in advance, pausing/rewinding them, then in a quick loop unpause them all?

Brent

ilparola · May 10, 2013, 5:42pm

Enlgish is not my language and it was a mistake writing “i face your problem” i meant that i resolved the problem.

here’s my “setsound” function (there is something that doesn’t fit in the topic)

function setSounds(event) &nbsp;&nbsp;&nbsp;&nbsp;self=event.target &nbsp;&nbsp;&nbsp;&nbsp;if myList~=nil then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if myList.isVisible==true then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;myList.isVisible=false &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;local doc\_path = system.pathForFile( nil, system.ResourceDirectory ) &nbsp;&nbsp;&nbsp;&nbsp;local doc\_path= doc\_path.."/kits/"..dataKits[self.id] &nbsp;&nbsp;&nbsp;&nbsp;local rel\_path = "kits/"..dataKits[self.id] &nbsp;&nbsp;&nbsp;&nbsp;kitText.text=dataKits[self.id] &nbsp;&nbsp;&nbsp;&nbsp;kitText:setReferencePoint(display.CenterLeftReferencePoint) &nbsp;&nbsp;&nbsp;&nbsp;kitText.x=1260 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local i=1 &nbsp; &nbsp; for file in lfs.dir(doc\_path) do &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if file ~= "." and file ~= ".." then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if string.find(file,".mp3") then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sounds[i]=audio.loadSound( rel\_path.."/"..i..".mp3" ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print (rel\_path.."/"..i..".mp3 -\> Caricato") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;i=i+1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sounds[i]=audio.loadSound( rel\_path.."/"..i..".aif" ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print (rel\_path.."/"..i..".aif -\> Caricato") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;i=i+1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; end &nbsp;&nbsp;&nbsp;&nbsp;for a=1,10 do &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for b=1,16 do&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pins[a][b].sound=sounds[a] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;end end &nbsp;

and here’s my playback function:

function playBack(colonna) &nbsp;&nbsp;&nbsp;&nbsp;local step=colonna%16+1 &nbsp;&nbsp;&nbsp;&nbsp;for a=1,10 do &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;--print (step) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if pins[a][step].isOn==1 then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;leds[a].alpha=1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pins[a][step]:playClip("pulse") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;canale=audio.findFreeChannel() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;audio.setVolume(pins[a].volume,{channel=canale}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if pins[a].isMute==1 then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;audio.setVolume(0,{channel=canale}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local mysource = audio.getSourceFromChannel(canale) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;al.Source(mysource, al.PITCH, pins[a].pitch) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;audio.play(pins[a][step].sound,{channel=canale}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transition.to(graphEq[a], {time=100, yScale=pins[a].volume\*20,onComplete=eqGoDown}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;indicatore.x=pins[1][step].x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transition.to( leds[a], { time=250, alpha=0.2} ) &nbsp;&nbsp;&nbsp;&nbsp;end end &nbsp;

yusufozk · May 11, 2013, 7:34pm

Hi,

I do as you say, audio.play(music1), audio.play(music2),…

But I want to start for eg. 10 music. If I start these one after other, the unimportant delay is:

10 * unimportant delay, and I think it may cause a little problem.

Btw, all are looping about every 10 seconds.

Anyway, I think it will stay like this I think.

ilparola · May 10, 2013, 2:47pm

Hi, i’m developing a drum machine and i face your same problem. if you do audio.play(sound1) audio.play(sound2) etc… they will start with an unimportant delay. Try it!

bjsorrentino · May 10, 2013, 5:30pm

Hi @ilparola,

I assume you’ve loaded all of these sounds in advance and stored them somewhere easily accessible to Lua and the audio system? If so, how about “playing” them in advance, pausing/rewinding them, then in a quick loop unpause them all?

Brent

ilparola · May 10, 2013, 5:42pm

Enlgish is not my language and it was a mistake writing “i face your problem” i meant that i resolved the problem.

here’s my “setsound” function (there is something that doesn’t fit in the topic)

function setSounds(event) &nbsp;&nbsp;&nbsp;&nbsp;self=event.target &nbsp;&nbsp;&nbsp;&nbsp;if myList~=nil then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if myList.isVisible==true then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;myList.isVisible=false &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;local doc\_path = system.pathForFile( nil, system.ResourceDirectory ) &nbsp;&nbsp;&nbsp;&nbsp;local doc\_path= doc\_path.."/kits/"..dataKits[self.id] &nbsp;&nbsp;&nbsp;&nbsp;local rel\_path = "kits/"..dataKits[self.id] &nbsp;&nbsp;&nbsp;&nbsp;kitText.text=dataKits[self.id] &nbsp;&nbsp;&nbsp;&nbsp;kitText:setReferencePoint(display.CenterLeftReferencePoint) &nbsp;&nbsp;&nbsp;&nbsp;kitText.x=1260 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local i=1 &nbsp; &nbsp; for file in lfs.dir(doc\_path) do &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if file ~= "." and file ~= ".." then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if string.find(file,".mp3") then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sounds[i]=audio.loadSound( rel\_path.."/"..i..".mp3" ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print (rel\_path.."/"..i..".mp3 -\> Caricato") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;i=i+1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sounds[i]=audio.loadSound( rel\_path.."/"..i..".aif" ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print (rel\_path.."/"..i..".aif -\> Caricato") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;i=i+1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; end &nbsp;&nbsp;&nbsp;&nbsp;for a=1,10 do &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for b=1,16 do&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pins[a][b].sound=sounds[a] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;end end &nbsp;

and here’s my playback function:

function playBack(colonna) &nbsp;&nbsp;&nbsp;&nbsp;local step=colonna%16+1 &nbsp;&nbsp;&nbsp;&nbsp;for a=1,10 do &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;--print (step) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if pins[a][step].isOn==1 then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;leds[a].alpha=1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pins[a][step]:playClip("pulse") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;canale=audio.findFreeChannel() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;audio.setVolume(pins[a].volume,{channel=canale}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if pins[a].isMute==1 then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;audio.setVolume(0,{channel=canale}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local mysource = audio.getSourceFromChannel(canale) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;al.Source(mysource, al.PITCH, pins[a].pitch) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;audio.play(pins[a][step].sound,{channel=canale}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transition.to(graphEq[a], {time=100, yScale=pins[a].volume\*20,onComplete=eqGoDown}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;indicatore.x=pins[1][step].x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transition.to( leds[a], { time=250, alpha=0.2} ) &nbsp;&nbsp;&nbsp;&nbsp;end end &nbsp;

yusufozk · May 11, 2013, 7:34pm

Hi,

I do as you say, audio.play(music1), audio.play(music2),…

But I want to start for eg. 10 music. If I start these one after other, the unimportant delay is:

10 * unimportant delay, and I think it may cause a little problem.

Btw, all are looping about every 10 seconds.

Anyway, I think it will stay like this I think.