core-audio

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How to convert a wav or caf audio file on iPhone

I am working on a iPhone IM app, which support audio message. I\'ve tried caf and wav format follow \"Speak Here\", but the files are too large to be send through the开发者_JS百科 internet. So I\'m wo[详细]

2023-04-13 03:12 分类：问答
AudioConverterFillComplexBuffer return -50 (paramErr)

I\'m trying to convert a PCM 32-bit float audio stream to ALAC. I found some working examples to build from, but my own code keeps getting a -50 (paramErr) from AudioConverterFillComplexBuffer. My eye[详细]

2023-04-12 00:10 分类：问答
Changing duration of Guitar pluck in PCM data

Folks, I am struggling with a simple concept related to the duration of play of PCM data. I would appreciate your feedback.[详细]

2023-04-11 12:22 分类：问答
OSX Core MIDI- Calling MIDIPacketListAdd from NSTimer

I\'m sending a string of MIDI packets using MIDIPacketListAdd. I want to change the packets dynamically during playback, so I\'m using a NSTimer to add each packet before the scheduled time the packet[详细]

2023-04-11 05:41 分类：问答
Can I limit the inNumberFrames passed by iOS in AURenderCallback function?

I created custom audio player class which use AudioUnit and ExtAudioFile. In my class I prepared my own render callback function such like[详细]

2023-04-11 04:30 分类：问答
How do you retain uniqueness of virtual MIDI source from MIDISourceCreate()?

I\'m working on a little hack sending MIDI messages from an app using RtMidi as a wrapper for CoreMIDI on OS X. I use RtMidiOut::openVirtualPort(\"MyAwesomePort\") so I can select my app as an input s[详细]

2023-04-10 03:49 分类：问答
Callback at certain times during audio playback

Is it possible to play an audio file from the user\'s ipod library and have a callback occur开发者_开发百科 whenever the player reaches a certain time point ? I need it to be very accurate, so simply[详细]

2023-04-09 21:14 分类：问答
Why might my AudioQueueOutputCallback not be called?

I\'m using the Audio Queue Services API to play audio streamed from a server over a TCP socket connection on an iPhone. I can play the buffers that were filled from the socket connection, I just canno[详细]

2023-04-09 09:05 分类：问答
Playing short selfmade sound with immediate start in iOS

I have a self-generated DTMF sound (with a wav header) generated by program that I want to be able to play quickly, in fact as soon as the user touches a bu开发者_运维技巧tton. This DTMF sound must pl[详细]

2023-04-08 15:23 分类：问答
iOS: How to read an audio file into a float buffer

I have a really short audio file, say a 10th of a second in (say) .PCM format I want to use RemoteIO to loop through the file repeatedly to produce a continuous musical tone.So how do I read this int[详细]

2023-04-06 22:48 分类：问答