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That did the trick! I play around with some of the values to try and up the quality, but I think im going to need external hardware for that. Thank you so much!
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Thank you for clearing all that up! I really appreciate the fast response too, thank you for that. This is the first time im really trying to code something, im still very new to this. I had accidentally put analogWrite but I had meant to put analogRead, I thought I needed it because the signal is coming from the DC pin on mic into ADC of the espruino. When I run code you posted I get
>[ "System Volume Information", "X.raw" ] =undefined >I tried playing the new file changing proper parameters and Im getting static.
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It wasn't reset properly. This is the code im currently using for the voice recording using the SPW2430(microphone)
var spi = new SPI(); spi.setup({mosi:B15, miso:B14, sck:B10}); E.connectSDCard(spi, B1); console.log(require("fs").readdirSync()); require("fs").writeFileSync("X.raw"); var w = new Waveform(512,{doubleBuffer:true,bits:16}); var a = new Uint16Array(512); w.on("buffer", function(buf) { a.set(buf); E.FFT(a); require("fs").appendFileSync("X.raw", a); var m=0,n=-1; for (var i=100;i<1000;i++)if(a[i]>n)n=a[m=i]; console.log(m.toFixed(0)+"Hz @ "+n); }); analogWrite(B0, 0.5, {freq:20000}); w.startInput(B0,2000,{repeat:true}); //w.stop(); setInterval(function() { w.stop(); },10000);would the Hardware drive the values for var i? meaning if my mic can record from 100Hz to 10kHz do i put i=100,i<10000?
with the code above the IDE writes
>[ "System Volume Information", "X.raw" ] =undefined 105Hz @ 4 127Hz @ 6 194Hz @ 5 128Hz @ 5 444Hz @ 6 423Hz @ 5 181Hz @ 4 107Hz @ 6 101Hz @ 4 506Hz @ 22 470Hz @ 7 469Hz @ 8 425Hz @ 6 233Hz @ 7 152Hz @ 6 130Hz @ 5 121Hz @ 6 438Hz @ 7 481Hz @ 10 168Hz @ 6 >I still cannot get proper voice playback so I thought maybe my sample rate needed to go up but, when I change the sample rate to 1024 in waveform and and Uint16array the IDE gives me an error code.
in function called from system Uncaught Error: Insufficient stack for computing FFT at line 2 col 10 E.FFT(a); -
Okay, so after trouble shooting that im now back to my original question, regarding using SPW2430(microphone). The code you had given me works to give me non zero values from the IDE.
var w = new Waveform(128); w.on("finish", function(buf) { for (var i in buf) console.log(buf[i]); }); w.startInput(B0,2000,{repeat:false});How can I record for X amount of time then save it as a .raw file to an SD connected to the espruino? this is my current code but its not functioning correctly.
var spi = new SPI(); spi.setup({mosi:B15, miso:B14, sck:B10}); E.connectSDCard(spi, B1); console.log(require("fs").readdirSync()); var w = new Waveform(128, {bits:16}); w.on("finish", function(buf) { require("fs").writeFileSync("sound.raw",buf); }); w.startInput(B0,2000,{repeat:false});IDE error code:
in function called from system Uncaught Error: Expecting first argument to be an array, not undefined at line 1 col 16 buf.set(fileBuf); -
Its slight noise, I think the hardware recommendation will fix it. Is there anyway to get volume control without adding more hardware such as a digital potentiometer?
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That worked perfectly! still getting a small amount of feedback that isn't a huge deal. Any recommendations to clean up the audio signal slightly more?
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Update: tried new headphone its much louder than the last one and your code worked. Though still having similar problems as before with playing a voice recording. The code we are using is posted below.
// SD card setup //DI(mosi) = B15 //DO(miso) = B14 //CK(sck = B10 //CS(CD pin) = B1 var spi = new SPI(); spi.setup({mosi:B15, miso:B14, sck:B10}); E.connectSDCard(spi, B1); console.log(require("fs").readdirSync()); var f = E.openFile("X-File.raw","r"); var w = new Waveform(2048, {doubleBuffer:true}); // load first bits of sound file w.buffer.set(f.read(w.buffer.length)); w.buffer2.set(f.read(w.buffer.length)); var fileBuf = f.read(w.buffer.length); // when one buffer finishes playing, load the next one w.on("buffer", function(buf) { buf.set(fileBuf); fileBuf = f.read(buf.length); if (fileBuf===undefined) w.stop(); // end of file }); // start output analogWrite(A7, 0.5); w.startOutput(A7,8000,{repeat:true});Where "X-File.raw" is a file I made in audacity using the guide lines provided in the waveform documentation and is in the proper format of .raw(header-less) unsigned 8-bit PCM with a 8000hz playback speed. As I play the file I can accurately make out each spoken word in the sentence however it is very fuzzy to the point where you can barely make out the words and a single high pitch tone can be heard overtop of that audio. Can you recommend anything that can possibly fix this?
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I tested it and I hear no sound through the headphone. when I take a meter to it and send your code to the espruino I receive 1.59V for a short duration, which should indicate at least the signal is going through. Im using pin A7 but tried it with B3, both give me the 1.59V when code is deployed. I will try with a few different speakers I shouldn't need an amp to power a single small two wire earphone speaker right?
@Gordon,
Do you have any suggestions on how to trouble shoot the audio for 16 bits? I keep trying to get sound at 16 bits but it's giving me back static, do you need to specify 16 bits in the playback code as well?