To reduce the download size of an iPhone application I'm compressing some audio files. Specifically I'm using afconvert on the command line to change .wav format to .caf format w/ ima4 compression. I've read this (wooji-juice.com) awesome post about this exact topic. I'm having trouble w/ the "decoding ima4 packets" step. I've looked...
I am currently trying to record compressed audio with the iPhone Simulator to a .caf container. More specifically I am using the IMA4 codec. It works fine if I have the Sample rate set to 44KHZ. But if I lower the setting to any other value (eg. 22KHZ, 16, or 8KHZ) the recorded file is being played back much slower?! This does not happen...
Hi, I'm using the SpeakHear sample app on Apple's developer site to create an audio recording app. I'm attempting to record directly to IMA4 format using the kAudioFormatAppleIMA4 system constant. This is listed as one of the usable formats, but every time I set up my audio format variable and pass and set it, I get a 'fmt?' error. Here ...
I am looking to record voice in as compact a file format as possible for an ipad app, and not concerned about sound quality. I chose the ima4 format but don't really know much about audio, so am having trouble figuring out how to play back the produced file to test how it sounds. Is this a compressed format that I have to uncompress wi...