audioqueue

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AudioQueue How to read the buffer from CallBack

I am Using AUdioQueue to record the audio from built-in mic and send it over socket, I have set the AudioQueuebuffer to record buffer of say 30 sec in once shot and allocating bufferSize appropriately[详细]

2023-03-09 20:32 分类：问答
AudioStreamBasicDescription for mp3

I have an Audio Queue working to record PCM, but I cannot get it to work for mp3. When I change the mFormatID to kAudioFormatMPEGLayer3, my callback function is never fired. I am usi开发者_开发知识库n[详细]

2023-03-09 19:42 分类：问答
iphone, objective c, how to read raw data from audio file (without codec applied)

I am developing an iphone app, which sends/receives data to audio/headphone jack of iphone. I assume we can send/receive data to hea开发者_运维知识库dphone jack but that data is audio file with some c[详细]

2023-03-09 01:29 分类：问答
is it possible to change the playback pitch of an audioqueue

This is supposed to be possible on Mac OS X by overwriting the sample rate in the AudioStreamBasicDescription then create a new output queue.[详细]

2023-03-05 13:59 分类：问答
iPhone AudioQueue - Reading incoming audio data to determine BPM

I\'m trying to determine Beats Per Minute (BPM) from the microphone using sound energy, I think I\'ve figured out the part determining BPM but having a little trouble obtaining the RAW data.[详细]

2023-03-03 19:15 分类：问答
playing pcm data on iphone

i need to play linear pcm data live on a iphone. i get a LIVE datastream via RTSP, and i can currently read it out from iphone, save it into a file, play it on a desktop audioplayer that supports pcm[详细]

2023-03-02 23:56 分类：问答
How can I modify the SpeakHere sample app to record in mono format on iPhone?

I am new to iPhone. Could you please help me to modify the SpeakHere app from Apple to record in mono format. What should I have to set for mChannelsPerFrame and what else should I set?[详细]

2023-02-16 10:08 分类：问答
How to make AudioQueue play without freezing GUI?

I just began learning about AudioQueues from the CoreAudio book (rough cuts). I did the AudioQueue playback example tutorial, which is basically the same as the apple tutorial example. Everything is w[详细]

2023-02-07 15:15 分类：问答
How to extract integer samples from audio queue buffer and write modified samples back?

for an iphone voice changing app (objective c), i am trying to take the sampled integer values from the recording audio queue buffer, process them in a function and write the modified values back to t[详细]

2023-02-07 02:10 分类：问答
how to convert level meter to Hz in iPhone?

I\'m using AudioQueue to get recording level meter via microphone. The problem is what I got from it are floating point numbers. I know they represents for audio sample.[详细]

2023-01-23 18:25 分类：问答