05-28-2012 05:56 AM
I am going to work on application that will play mix two audio streams. I read in a few sources that the device capability of doing this can be queried with: System.getProperty("supports.mixing"). In all of the simulators I tried, as well as on my 9700 Bold, it always returns "false". I wonder which models support this? References state most of the GSM models support this feature, I am confused. Thanks in advance,
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05-30-2012 09:35 AM
Basically, GSM devices support multiple audio channels. CDMA do not.. The simulator may not be giving you accurate data, try it on an actual device.
05-31-2012 10:54 AM
All devices will return false for supports.mixing. As Paul mentioned, you can mix sounds by using 2 players simultaneously on devices that support it. Otherwise, you will have to mix the audio yourself before passing to a player. It isn't difficult to do, a forum search should give you articles and sample code that explains how, and the DevConOnDemand portal has relevent content as well.
05-31-2012 11:29 AM - edited 05-31-2012 11:30 AM
Thank you BVP. I had searched the forum about this, will do a more detailed search and will have a look at the DevConOnDemand portal.
I am wondering now, why will all devices return supports.mixing?
05-31-2012 11:46 AM
Good question. According to the MMAPI spec the requirements for supports.mixing is:
Query for whether audio mixing is supported. The string returned is either "true" or "false". If mixing is supported, the following conditions are true:
Manager.playTonecan be used at the same time when at least one
Playeris playing back audio.
Playerscan be used to play back audio simultaneously
Since I have just verified that the return value is hard-coded to false for all devices, it would appear you've found a bug