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Wav.seek(FormatStart+16,0) ‘ Offset: 29 Bytes per second (if only 1 channel)ĪppendLog( 'bytes= ' & str$(WavBytesSec)) Wav.seek(FormatStart+12,0) ‘ Offset: 25 length: 4 - Samples per second (frequency, Hz, typically 44100 or 48000) Wav.seek(FormatStart+10,0) ‘ Offset: 23 length: 2ĪppendLog( 'chan=' & str$(WavChannels)) Wav.open( CommandName & '.wav',fmOpenRead)įormatStart = instr(WavHeader,'fmt')-1 ‘ Offset: 13 length: 4 (including trailing null)

From RAW2LIRC source:įunction ExamineWav(CommandName as string) as integer

Years ago I wrote some programs using RapidQ language (a VBA-like free compiler). Jumpjack said, on 28 gennaio 2016 at 13:38 Infrared generator from audio signal source References and credits at bottom of this page: Please report results of your experiments! Good or bad, please just report and share! 😉 Audacity, opensource and multiplatform (Windows/Linux)Ī – Plug the emitter into HEADPHONE output of your audio cardī – Position the two leds just in front of your deviceĬ – Press PLAY in Audacity: your device should react to the command you previously sampled.ġ – For unknown reason, playing the resulting signal in Audacity works fine to control my device but if I save the signal into a WAV file and reload it in Audacity, playing it results in… nothing! Any explanation for this?!? FIXED: it was due to wrong carrier frequency of rebuilt signal, which must be HALF of the needed carrier frequency! (19 KHz for 38 KHz, 18 KHz for 36 KHz…)Ģ – You can’t save the signal in OGG or MP3 format, because this format distort the original signal – 2 IR led (0$ if you have a couple of old remote controls, 1$ if you need to buy them) – 1 spare headphone cable (0$ if you already have it, 10$ if you need a new one) This method was tested with a VIA AC’97 audio card please report if you have any success with different cards. You won’t need anymore complex circuits & complex software to sample commands from your remote control and to replicate them all you need is just two standard IR led, which you can afford for about 0.50 $ each, or maybe you can extract from a couple of old remotes.

External IR blaster devices to fit in 3.5 mm plug:

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