Play X hertz

[Chris86]

How can I play the X hertz from my speaker?

I would like to have something that is equally Beep feature, but it must be played back from the speaker

[Uriziel01]

Look for MIDI UDF on board, but im not quite sure if it allow to play some frequency (in hz) from the speaker. But I wish you good luck in searching

[BrettF]

Bass.dll has it covered

expandcollapse popup

Global Const $BASS_SAMPLE_LOOP = 4  
Global Const $BASS_SAMPLE_OVER_POS = 0x20000

$Hz = 40
$L = 1000
$A = 32760
$SR = 22000
$Pi = 3.1415 
$F = (2 * $Pi * $Hz) / $SR

$bass_dll = DllOpen ("Bass.dll")

$ret = DllCall($bass_dll, "int", "BASS_Init", "int", -1, _
        "int", 44100, _
        "int", 0, _
        "hwnd", 0, _
        "ptr", 0)
If Not $ret[0] Then
    MsgBox(0, "Error", 'Error initializing audio!');
    Exit
EndIf

$HSAMPLE = DllCall ($bass_dll, "dword", "BASS_SampleCreate", "dword", 256, "dword", 28160, "dword", 1, "dword", 1, "dword", $BASS_SAMPLE_LOOP + $BASS_SAMPLE_OVER_POS); // create sample

$struct = DllStructCreate ("char[128]")

For $i = 0 To 128
    $data = ($A * (sin($F * $i)))
    DllStructSetData ($struct, 1, $data, $i)
    $ret = DllCall ($bass_dll, "dword", "BASS_SampleSetData", "dword", $HSAMPLE[0], "ptr", DllStructGetPtr ($struct)); // set the sample's data 
Next
$hchan = DllCall ($bass_dll, "dword", "BASS_SampleGetChannel", "dword", $HSAMPLE[0], "int", 1)

$ret = DllCall($bass_dll, "int", "BASS_ChannelPlay", "dword", $hchan[0], "int", 0)
Sleep (5000)

DllCall ($bass_dll, "int", "BASS_SampleStop", "dword", $HSAMPLE[0])
DllCall ($bass_dll, "int", "BOOL BASS_Free")

Pretty sure my method of calculation was wayyy off, but I'm sure someone can fix that up

[Uriziel01]

Oh, yeah bass.dll ! I have forgothed about it Thx for fixing me

[BrettF]

I posted it because it made some sound, but from the bass.dll example, its audibly different.

For a 440Hz wave, they had:

HSAMPLE sample=BASS_SampleCreate(256, 28160, 1, 1, BASS_SAMPLE_LOOP|BASS_SAMPLE_OVER_POS); // create sample
short data[128]; // data buffer
int a;
for (a=0; a<128; a++)
    data[a]=(short)(32767.0*sin((double)a*6.283185/64)); // sine wave
BASS_SampleSetData(sample, data); // set the sample's data

Different :|

I got my method from http://www.geocities.com/SiliconValley/Cam...8645/synth.html

[microera]

Can anybody make this working? BASS_SampleCreate

and then Play with BASS?

Pleaseeee for working code.......

[eukalyptus]

Here you are:

#AutoIt3Wrapper_UseX64=n
#include "Bass.au3"

Global $nFreq = 440 ; Hz
Global Const $pi = ATan(1) * 4

_BASS_Startup()
_BASS_Init(0, -1, 44100, 0, "")

Global $hSample = _Bass_SampleCreate(88200, 44100, 1, 1, $BASS_SAMPLE_LOOP)

Global $tSampleData = DllStructCreate("short[44100]")
Global $fTmp = $pi * 2 / (44100 / $nFreq)
For $i = 1 To 44100
DllStructSetData($tSampleData, 1, 32767 * Sin($i * $fTmp), $i)
Next
_Bass_SampleSetData($hSample, DllStructGetPtr($tSampleData))


Global $hChan = _Bass_SampleGetChannel($hSample, 0)
_BASS_ChannelSetVolume($hChan, 30)
_Bass_ChannelPlay($hChan, 0)

Sleep(5000)

_Bass_SampleStop($hSample)
_BASS_SampleFree($hSample)
_BASS_Free()

[microera]

thanks eukalyptus but: compile and run working OK .....

but on my speakers is silence!

?

[BrewManNH]

thanks eukalyptus but: compile and run working OK .....

but on my speakers is silence!

?

That script worked for me, are you sure it wasn't playing and the volume was just too low, because that frequency is hard to hear at a low volume.

[microera]

I try with sox play dos command:

_RunDos("play -n -n synth 1 sine 440 ")

and I hear 440Hz

....

[microera]

I test on 2 PCs (winXP SP3) and on both not working!

Compile and RUN OK ..but nothing hear from speakers....

?

[BrewManNH]

You do have the Bass.dll file and it's located in the script directory correct?

BTW, there's no reason to compile the script if all you want to do is test it, you can run it from SciTE by pressing F5 if you're using SciTE.

[microera]

Nice!! working!

I copy bass.dll to working directory and all working! Thanks BrewManNH!!