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2014/10/15 ¤U¤È 10:10:07

iphone Programming Glossary: hz

SimpleAudioEngine, playing .caf files [duplicate]

http://stackoverflow.com/questions/10286686/simpleaudioengine-playing-caf-files

does play when I click it. In terminal when I write afinfo MenuTheme.caf It tells me the data format is 2 ch 44100 Hz 'lpcm' 0x0000000C 16 bit little endian signed integer no channel layout. I really don't know what's wrong but I'm also very..

Source for a good, simple, soft modem library

http://stackoverflow.com/questions/10693590/source-for-a-good-simple-soft-modem-library

n long pRx CarrierAngle long pRx CarrierCnt long pRx CarrierAngle pRx CarrierCnt #endif Frequency tolerance is 16 Hz per the V.23 spec if ph pRx OnesFreq 17.0 pRx MidFreq 360.0 pRx SampleRate ph pRx OnesFreq 17.0 pRx MidFreq 360.0 pRx SampleRate..

where to start with audio synthesis on iPhone

http://stackoverflow.com/questions/2067267/where-to-start-with-audio-synthesis-on-iphone

just supports playing two sine wave tones one per stereo channel. The sound data is liitle endian signed 16 bit @ 44.1KHz class BleepMachine static void staticQueueCallback void userData AudioQueueRef outAQ AudioQueueBufferRef outBuffer BleepMachine.. 69 return CalculateFrequencyFromNote semiTones 4 for SInt32 midiNote 21 midiNote 108 midiNote printf MIDI Note d f Hz n int midiNote CalculateFrequencyFromMIDINote midiNote Update Basic usage info Initialise. Somehere near the start I'm using..

How can I record AMR audio format on the iPhone?

http://stackoverflow.com/questions/276644/how-can-i-record-amr-audio-format-on-the-iphone

to. Edit Here's what I have for the PCM version If we want to use AMR instead of PCM AMR Format Sampling Frequency 8 kHz 13 bit 160 samples for 20 ms frames filtered to 200 3400 Hz eight source codecs 12.2 1.2 7.95 7.40 6.70 5.90 5.15 4.75 kbit.. to use AMR instead of PCM AMR Format Sampling Frequency 8 kHz 13 bit 160 samples for 20 ms frames filtered to 200 3400 Hz eight source codecs 12.2 1.2 7.95 7.40 6.70 5.90 5.15 4.75 kbit s generated frame length 244 204 159 148 134 118 103 95.. 244 204 159 148 134 118 103 95 bits per frame format mFormatID kAudioFormatLinearPCM format mSampleRate 8000.0 8 kHz format mFramesPerPacket 1 1 frame per packet format mChannelsPerFrame 1 Mono format mBytesPerFrame 2 8 bits per frame round..

Determining the magnitude of a certain frequency on the iPhone

http://stackoverflow.com/questions/2921674/determining-the-magnitude-of-a-certain-frequency-on-the-iphone

interest. k is just the indexing on the output of the DFT. Mapping k indexes of the DFT output into real frequencies Hz depends on two things Sampling frequency for example 44100 Hz for CD Audio FFT size Real frequencies are mapped to k as.. k indexes of the DFT output into real frequencies Hz depends on two things Sampling frequency for example 44100 Hz for CD Audio FFT size Real frequencies are mapped to k as follows F k Fs N for k 0 ... N 2 1 N 1 2 for odd N or k F N Fs.. FFT size Real frequencies are mapped to k as follows F k Fs N for k 0 ... N 2 1 N 1 2 for odd N or k F N Fs for F 0Hz ... Fs 2 Fs N where F is the frequency in Hz N is the FFT size and Fs is the sampling frequency Hz . Some things to note..

What video formats are compatible with the assets library?

http://stackoverflow.com/questions/3257224/what-video-formats-are-compatible-with-the-assets-library

Retina Retina 6119419764_orig.mov H.264 1 920 x 1 080 NO NO NO Linear PCM 16 bit little endian signed integer 48000 Hz Stereo L R 35.33 Mbit s 6119419764_hd.mp4 AVC Coding 1 280 x 720 NO YES YES AAC 44100 Hz Stereo L R 2.15 Mbit s 6119419764_site.mp4.. endian signed integer 48000 Hz Stereo L R 35.33 Mbit s 6119419764_hd.mp4 AVC Coding 1 280 x 720 NO YES YES AAC 44100 Hz Stereo L R 2.15 Mbit s 6119419764_site.mp4 AVC Coding 640 x 360 NO YES YES AAC 44100 Hz Stereo L R 833.71 kbit s 6119419764_mobile.mp4.. 280 x 720 NO YES YES AAC 44100 Hz Stereo L R 2.15 Mbit s 6119419764_site.mp4 AVC Coding 640 x 360 NO YES YES AAC 44100 Hz Stereo L R 833.71 kbit s 6119419764_mobile.mp4 AVC Coding 568 x 320 YES YES YES AAC 32000 Hz Mono 775.14 kbit s 6121206003_orig.mov..

Getting displacement from accelerometer data with Core Motion

http://stackoverflow.com/questions/4449565/getting-displacement-from-accelerometer-data-with-core-motion

integration twice. Situation will become even worse after one second if you configure accelerometer with let's say 50 Hz i.e. 50 ticks are processed and the tiny neglectable error will outrun the true value. I would strongly recommend to not..

What's the best approach to draw lines between views?

http://stackoverflow.com/questions/5847876/whats-the-best-approach-to-draw-lines-between-views

impressive Rendering 30 draggable views each connected to each other resulting in 435 lines renders smoothly at 60Hz on an iPad 2 using Core Animation. When using the classic approach the framerate drops to 5 Hz and memory warnings eventually..