I want to record audio from user and play it back.
This I have implemented.
My need is to capture the audio that app produces. Can I record the audio using avAudiorecorder.
Is there is any problem for recording audio using two simultaneous recorders
Related
I am trying to record the sound from iPhone speaker. I am able to do that, but I am unable to avoid mic input in the recorded output. Tried with sample code available in different websites with no luck.
The sample which I used does the recording with audio units. I need to know if there is any property for audio unit to set the mic input volume to zero. Above that I came to from other posts that Audio Queue services can do the thing for me. Can any one redirect me with sample code for the audio queue services implementation. I need to know whether there is a way of writing the data to an separate audio file before sending it as input to speaker.
Thanks in advance
There is no public iOS API or property for recording generic audio sent to the iPhone speaker. Only mic input can be recorded.
But if you are playing audio in your app using only uncompressed samples with Audio Queues or the RemoteIO Audio Unit, you can just copy those samples to a file before you write them to the audio callback buffers. Those saved samples can be used to construct a recording.
I am working on radio app in which i want to record live radio streaming on an record button click.It should record just the radio streaming sound. Currently i am recording from Mike but its not the way i want as it also captures the surrounding/background voice. I did read few post but all of them are regarding AVaudioRecorder. I have used wunderradio api for playing the radio from url. I haven't got any method/function in their api which will record that audio from url. I want to record the buffered audio only from that url,so that I can play that recorded file later.
Any help would be appreciated.
Recording audio playback by using the microphone is really not the right way to do it. If you're using AudioQueue services for audio playback you can use the AudioFileWritePackets function to write audio data to a file.
If you implement recording this way you can write audio files in the format they're streamed in. So an mp3 audio stream can be written as an mp3 file to disk since you're writing encoded audio packets with the AudioFileWritePackets function.
To get a better understanding of how this all should be implemented you can have a look at the SpeakHere sample code of Apple. The SpeakHere project records from the microphone but it's still a good example to see how the AudioFileWritePackets function works. In your case you need to use the AudioFileWritePackets function in the output callback of your AudioQueue. This is the callback that's called when a buffer is finished playing. So it's a good to place to write the already played audio buffers data to a file.
I am developing an app module in which i am doing audio recording with also video recording.
but i want to record only device intrnal playing sound , not the device external voice.
If any advise or suggestion to got it..!!
I'm not sure but maybe you can use buffers to write them into a file Audio units or Audio Queues without using mic
In my application, I'm playing an audio using audio toolbox framework.
When its playing, how can I record the same?
I tried using AVAudioRecording by setting audio session "Play and Record". But when recording, the volume of the audio being played is getting reduced.
How can I use Audiotoolbox framework itself and record the audio?
Can some one help me?
You can't use the AVAudioRecorder to record itself. You can use the Audio Queue or the Audio Unit RemoteIO APIs, and capture the audio samples you are putting in the output buffers to play as you play them.
AVAudioRecorder allows the recording of external audio. However I wish to record the audio made by my application (through numerous AVAudioPlayers), is this possible on the iPhone?
If you want to record the sounds your iOS app makes, you have to use a much lower lever API, such as Audio Unit RemoteIO, or Audio Queues with raw PCM audio samples.