[Flashcoders] Audio lag on KeyboardEvent.KEY_DOWN
Hi List, I'm dipping my toe into AS3 and thought I'd play around with sound by making a little piano keyboard which is played by pressing keys on the computer keyboard. It works - the appropriate sounds play on KeyboardEvent.KEY_DOWN - however, I've noticed that there is often a lag between the keyboard event and the actual sound playing. The occurrence of the lag seems pretty random. The sounds are MP3s which are load()ed into Sound objects on init(). On KeyboardEvent.KEY_DOWN, the appropriate Sound is play()ed. I've checked all the MP3s, and they don't have extra silence at the beginning. I don't think it has to do with the number of MP3s involved (14), because I noticed the lag even when I was testing it out with 2 sounds. Has anyone dealt with this before, and know what the problem might be? You can see (or rather, hear) the lag for yourself here: http://snipurl.com/7ndr2-meep Thanks! In hope, CB. ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Audio lag on KeyboardEvent.KEY_DOWN
did you use updateAfterEvent() to force it to play immediately? if not, it might be waiting for the next frame to process the event On Mon, Dec 8, 2008 at 12:14 PM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi List, I'm dipping my toe into AS3 and thought I'd play around with sound by making a little piano keyboard which is played by pressing keys on the computer keyboard. It works - the appropriate sounds play on KeyboardEvent.KEY_DOWN - however, I've noticed that there is often a lag between the keyboard event and the actual sound playing. The occurrence of the lag seems pretty random. The sounds are MP3s which are load()ed into Sound objects on init(). On KeyboardEvent.KEY_DOWN, the appropriate Sound is play()ed. I've checked all the MP3s, and they don't have extra silence at the beginning. I don't think it has to do with the number of MP3s involved (14), because I noticed the lag even when I was testing it out with 2 sounds. Has anyone dealt with this before, and know what the problem might be? You can see (or rather, hear) the lag for yourself here: http://snipurl.com/7ndr2-meep Thanks! In hope, CB. ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Audio lag on KeyboardEvent.KEY_DOWN
I'm very interested in the solution to this. I notice it on certain machines and not others... it does not seem to have anything to do with the input part, and in some cases can stutter the display updating. For example, if you were to have a timer trigger the sound and print something at the screen, they would both 'appear' at the same time but if you also measured the time difference between the trigger's execution and after the sound call, there would be latency. The superstitious/uneducated part of me supposes that Flash is establishing a modal call to the sound card, and some perform cards respond faster than others. -jonathan On Mon, Dec 8, 2008 at 2:37 PM, allandt bik-elliott (thefieldcomic.com) [EMAIL PROTECTED] wrote: did you use updateAfterEvent() to force it to play immediately? if not, it might be waiting for the next frame to process the event On Mon, Dec 8, 2008 at 12:14 PM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi List, I'm dipping my toe into AS3 and thought I'd play around with sound by making a little piano keyboard which is played by pressing keys on the computer keyboard. It works - the appropriate sounds play on KeyboardEvent.KEY_DOWN - however, I've noticed that there is often a lag between the keyboard event and the actual sound playing. The occurrence of the lag seems pretty random. The sounds are MP3s which are load()ed into Sound objects on init(). On KeyboardEvent.KEY_DOWN, the appropriate Sound is play()ed. I've checked all the MP3s, and they don't have extra silence at the beginning. I don't think it has to do with the number of MP3s involved (14), because I noticed the lag even when I was testing it out with 2 sounds. Has anyone dealt with this before, and know what the problem might be? You can see (or rather, hear) the lag for yourself here: http://snipurl.com/7ndr2-meep Thanks! In hope, CB. ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- -jonathan howe ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Audio lag on KeyboardEvent.KEY_DOWN
Hi Jonathan, You say: The sounds are MP3s which are load()ed into Sound objects on init(). Does this mean you preload the sounds? If so; If you press a key before the whole sound is loaded in it takes some time to play it, because it is still loading. You can make sure of this by showing the application AFTER all the sounds are loaded in, this can be done by creating a loader que (place items in an array after they are loaded and check if the total amount of items loaded in is equal to the array length). This way you always know that nothing shows up before all the sounds are loaded. Hope this helps you, Sid On Dec 8, 2008, at 4:31 PM, jonathan howe wrote: I'm very interested in the solution to this. I notice it on certain machines and not others... it does not seem to have anything to do with the input part, and in some cases can stutter the display updating. For example, if you were to have a timer trigger the sound and print something at the screen, they would both 'appear' at the same time but if you also measured the time difference between the trigger's execution and after the sound call, there would be latency. The superstitious/uneducated part of me supposes that Flash is establishing a modal call to the sound card, and some perform cards respond faster than others. -jonathan On Mon, Dec 8, 2008 at 2:37 PM, allandt bik-elliott (thefieldcomic.com) [EMAIL PROTECTED] wrote: did you use updateAfterEvent() to force it to play immediately? if not, it might be waiting for the next frame to process the event On Mon, Dec 8, 2008 at 12:14 PM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi List, I'm dipping my toe into AS3 and thought I'd play around with sound by making a little piano keyboard which is played by pressing keys on the computer keyboard. It works - the appropriate sounds play on KeyboardEvent.KEY_DOWN - however, I've noticed that there is often a lag between the keyboard event and the actual sound playing. The occurrence of the lag seems pretty random. The sounds are MP3s which are load()ed into Sound objects on init(). On KeyboardEvent.KEY_DOWN, the appropriate Sound is play()ed. I've checked all the MP3s, and they don't have extra silence at the beginning. I don't think it has to do with the number of MP3s involved (14), because I noticed the lag even when I was testing it out with 2 sounds. Has anyone dealt with this before, and know what the problem might be? You can see (or rather, hear) the lag for yourself here: http://snipurl.com/7ndr2-meep Thanks! In hope, CB. ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- -jonathan howe ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Sidney de Koning Flash / AIR Developer @ www.funky-monkey.nl Technical writer @ www.insideria.com ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Audio lag on KeyboardEvent.KEY_DOWN
That part was actually confusticate's and I do believe that he was implying that the sounds had load() called prior to the KeyboardEvent, and the latency happens on the 100th keystroke as well as the first. By way of comparison, I had the same problem in sounds attached from the library. I wonder if it would make a difference if new Sound objects (in AS2) or SoundChannels (in AS3) were or weren't instantiated every time. On Mon, Dec 8, 2008 at 4:49 PM, Sidney de Koning [EMAIL PROTECTED]wrote: Hi Jonathan, You say: The sounds are MP3s which are load()ed into Sound objects on init(). Does this mean you preload the sounds? If so; If you press a key before the whole sound is loaded in it takes some time to play it, because it is still loading. You can make sure of this by showing the application AFTER all the sounds are loaded in, this can be done by creating a loader que (place items in an array after they are loaded and check if the total amount of items loaded in is equal to the array length). This way you always know that nothing shows up before all the sounds are loaded. Hope this helps you, Sid On Dec 8, 2008, at 4:31 PM, jonathan howe wrote: I'm very interested in the solution to this. I notice it on certain machines and not others... it does not seem to have anything to do with the input part, and in some cases can stutter the display updating. For example, if you were to have a timer trigger the sound and print something at the screen, they would both 'appear' at the same time but if you also measured the time difference between the trigger's execution and after the sound call, there would be latency. The superstitious/uneducated part of me supposes that Flash is establishing a modal call to the sound card, and some perform cards respond faster than others. -jonathan On Mon, Dec 8, 2008 at 2:37 PM, allandt bik-elliott (thefieldcomic.com) [EMAIL PROTECTED] wrote: did you use updateAfterEvent() to force it to play immediately? if not, it might be waiting for the next frame to process the event On Mon, Dec 8, 2008 at 12:14 PM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi List, I'm dipping my toe into AS3 and thought I'd play around with sound by making a little piano keyboard which is played by pressing keys on the computer keyboard. It works - the appropriate sounds play on KeyboardEvent.KEY_DOWN - however, I've noticed that there is often a lag between the keyboard event and the actual sound playing. The occurrence of the lag seems pretty random. The sounds are MP3s which are load()ed into Sound objects on init(). On KeyboardEvent.KEY_DOWN, the appropriate Sound is play()ed. I've checked all the MP3s, and they don't have extra silence at the beginning. I don't think it has to do with the number of MP3s involved (14), because I noticed the lag even when I was testing it out with 2 sounds. Has anyone dealt with this before, and know what the problem might be? You can see (or rather, hear) the lag for yourself here: http://snipurl.com/7ndr2-meep Thanks! In hope, CB. ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- -jonathan howe ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Sidney de Koning Flash / AIR Developer @ www.funky-monkey.nl Technical writer @ www.insideria.com ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- -jonathan howe ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Audio lag on KeyboardEvent.KEY_DOWN
Hi, a colleague of mine noticed the same problem with attached sounds in as3. He had to start music loops simultaneously and it turn out impossible by actionscript alone, because of a random lag. The only solution he found was to launch the sounds in the same keyframe in the timeline. Perhaps a timeline-based solution of your problem is possible: for example using the keys to controls movieClips with different labels (each label having one sound), and using updateAfterEvent as advised previsously. Or, one clip per sound. If it solves your problem, you can still control the volume of an IDE-specfied sound by using the soundChannel property of movieClips. Olivier jonathan howe a écrit : That part was actually confusticate's and I do believe that he was implying that the sounds had load() called prior to the KeyboardEvent, and the latency happens on the 100th keystroke as well as the first. By way of comparison, I had the same problem in sounds attached from the library. I wonder if it would make a difference if new Sound objects (in AS2) or SoundChannels (in AS3) were or weren't instantiated every time. On Mon, Dec 8, 2008 at 4:49 PM, Sidney de Koning [EMAIL PROTECTED]wrote: Hi Jonathan, You say: The sounds are MP3s which are load()ed into Sound objects on init(). Does this mean you preload the sounds? If so; If you press a key before the whole sound is loaded in it takes some time to play it, because it is still loading. You can make sure of this by showing the application AFTER all the sounds are loaded in, this can be done by creating a loader que (place items in an array after they are loaded and check if the total amount of items loaded in is equal to the array length). This way you always know that nothing shows up before all the sounds are loaded. Hope this helps you, Sid On Dec 8, 2008, at 4:31 PM, jonathan howe wrote: I'm very interested in the solution to this. I notice it on certain machines and not others... it does not seem to have anything to do with the input part, and in some cases can stutter the display updating. For example, if you were to have a timer trigger the sound and print something at the screen, they would both 'appear' at the same time but if you also measured the time difference between the trigger's execution and after the sound call, there would be latency. The superstitious/uneducated part of me supposes that Flash is establishing a modal call to the sound card, and some perform cards respond faster than others. -jonathan On Mon, Dec 8, 2008 at 2:37 PM, allandt bik-elliott (thefieldcomic.com) [EMAIL PROTECTED] wrote: did you use updateAfterEvent() to force it to play immediately? if not, it might be waiting for the next frame to process the event On Mon, Dec 8, 2008 at 12:14 PM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi List, I'm dipping my toe into AS3 and thought I'd play around with sound by making a little piano keyboard which is played by pressing keys on the computer keyboard. It works - the appropriate sounds play on KeyboardEvent.KEY_DOWN - however, I've noticed that there is often a lag between the keyboard event and the actual sound playing. The occurrence of the lag seems pretty random. The sounds are MP3s which are load()ed into Sound objects on init(). On KeyboardEvent.KEY_DOWN, the appropriate Sound is play()ed. I've checked all the MP3s, and they don't have extra silence at the beginning. I don't think it has to do with the number of MP3s involved (14), because I noticed the lag even when I was testing it out with 2 sounds. Has anyone dealt with this before, and know what the problem might be? You can see (or rather, hear) the lag for yourself here: http://snipurl.com/7ndr2-meep Thanks! In hope, CB. ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- -jonathan howe ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Sidney de Koning Flash / AIR Developer @ www.funky-monkey.nl Technical writer @ www.insideria.com ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- Olivier Besson (gludion) - (33 1) 44 64 78 99 http://.gludion.com http://blog.gludion.com ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Audio lag on KeyboardEvent.KEY_DOWN
I'm actually running into a very similar problem trying to create my little flash-based drum machine. I've got a 100 ms .wav that I'm trying to play on a regular basis and no matter what I try, it comes out sounding weird and erratic. I was hoping there was some magic Here's how you compress and/or pre-load the sound so that it plays instantly trick that I was missing. I've done several tests -- from playing the sound every x frames, to playing the sound every x ms, to keeping two identical copies of the same sound and alternating between them, but nothing seems to help much. I'd be glad to share some test code if anybody's interested in trying this at home, but it sounds like maybe the problem is Flash's and not mine. Maybe I'll put together some hacked-together timeline solution and see if that helps at all... CB, when this is all over, your piano and my drummer can jam. --T On Mon, Dec 8, 2008 at 10:13 AM, Olivier Besson [EMAIL PROTECTED] wrote: Hi, a colleague of mine noticed the same problem with attached sounds in as3. He had to start music loops simultaneously and it turn out impossible by actionscript alone, because of a random lag. The only solution he found was to launch the sounds in the same keyframe in the timeline. Perhaps a timeline-based solution of your problem is possible: for example using the keys to controls movieClips with different labels (each label having one sound), and using updateAfterEvent as advised previsously. Or, one clip per sound. If it solves your problem, you can still control the volume of an IDE-specfied sound by using the soundChannel property of movieClips. Olivier jonathan howe a écrit : That part was actually confusticate's and I do believe that he was implying that the sounds had load() called prior to the KeyboardEvent, and the latency happens on the 100th keystroke as well as the first. By way of comparison, I had the same problem in sounds attached from the library. I wonder if it would make a difference if new Sound objects (in AS2) or SoundChannels (in AS3) were or weren't instantiated every time. On Mon, Dec 8, 2008 at 4:49 PM, Sidney de Koning [EMAIL PROTECTED] wrote: Hi Jonathan, You say: The sounds are MP3s which are load()ed into Sound objects on init(). Does this mean you preload the sounds? If so; If you press a key before the whole sound is loaded in it takes some time to play it, because it is still loading. You can make sure of this by showing the application AFTER all the sounds are loaded in, this can be done by creating a loader que (place items in an array after they are loaded and check if the total amount of items loaded in is equal to the array length). This way you always know that nothing shows up before all the sounds are loaded. Hope this helps you, Sid On Dec 8, 2008, at 4:31 PM, jonathan howe wrote: I'm very interested in the solution to this. I notice it on certain machines and not others... it does not seem to have anything to do with the input part, and in some cases can stutter the display updating. For example, if you were to have a timer trigger the sound and print something at the screen, they would both 'appear' at the same time but if you also measured the time difference between the trigger's execution and after the sound call, there would be latency. The superstitious/uneducated part of me supposes that Flash is establishing a modal call to the sound card, and some perform cards respond faster than others. -jonathan On Mon, Dec 8, 2008 at 2:37 PM, allandt bik-elliott (thefieldcomic.com) [EMAIL PROTECTED] wrote: did you use updateAfterEvent() to force it to play immediately? if not, it might be waiting for the next frame to process the event On Mon, Dec 8, 2008 at 12:14 PM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi List, I'm dipping my toe into AS3 and thought I'd play around with sound by making a little piano keyboard which is played by pressing keys on the computer keyboard. It works - the appropriate sounds play on KeyboardEvent.KEY_DOWN - however, I've noticed that there is often a lag between the keyboard event and the actual sound playing. The occurrence of the lag seems pretty random. The sounds are MP3s which are load()ed into Sound objects on init(). On KeyboardEvent.KEY_DOWN, the appropriate Sound is play()ed. I've checked all the MP3s, and they don't have extra silence at the beginning. I don't think it has to do with the number of MP3s involved (14), because I noticed the lag even when I was testing it out with 2 sounds. Has anyone dealt with this before, and know what the problem might be? You can see (or rather, hear) the lag for yourself here: http://snipurl.com/7ndr2-meep Thanks! In hope, CB. ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com
