I've looked all over for an example of how to create a Wave file.
No luck.
Plenty of examples of how to use one.
Any ideas where I can find one????
EX: want to create a wave file to sound middle C.
Frequency 261.63 Wavelength 132 cm
Any help would be very much appreciated.
JPS
No luck.
Plenty of examples of how to use one.
Any ideas where I can find one????
EX: want to create a wave file to sound middle C.
Frequency 261.63 Wavelength 132 cm
Any help would be very much appreciated.
JPS
now, open a very small 16-bit 44100 mono wavefile you have at your HDD. If you do not have one, create with Record. Make sure you convert it to that format. No matter whether it's a silent wave or anything. While looking at the structure definition of the waveheader ("fmt ") chunk, see the hex-editor view of the file (so that you can see the "RIFF" and "data" texts). Aww, here's the structure:
WaveFile struct
RIFF dd "FFIR" ; note that it's reversed. Do not modify
TotalSize dd ? ; fill later !
WAVE dd "EVAW"
FMT dd " tmf"
fmtsiz dd 16
format dw 1
channels dw 1
samplespers dd 44100
avgbytesps dd 88200
blockali dw 2
bitspersa dw 16
datum dd "ATAD"
datumsiz dd ? ; fill later!
WaveFile ends
TotalSize = (2 * SamplesNum) + 32
,where SamplesNum is the number of samples :P
datumsiz = 2 * SamplesNum
after you fill in these 2 variables, write the whole structure into a file. The next thing to write in the file is the waveform itself.
To create it, first allocate some memory
.data
HEAP1 dd 0
.code
invoke GetProcessHeap
mov HEAP1,eax
Then, with the help of fsin compute the sinusoidal wave, write the buffer into the file,
invoke CloseHandle,file1 ; this is the wavefile
free buffer, and you're ready.
WaveFile struct
RIFF dd "FFIR" ; note that it's reversed. Do not modify
TotalSize dd ? ; fill later !
WAVE dd "EVAW"
FMT dd " tmf"
fmtsiz dd 16
format dw 1
channels dw 1
samplespers dd 44100
avgbytesps dd 88200
blockali dw 2
bitspersa dw 16
datum dd "ATAD"
datumsiz dd ? ; fill later!
WaveFile ends
TotalSize = (2 * SamplesNum) + 32
,where SamplesNum is the number of samples :P
datumsiz = 2 * SamplesNum
after you fill in these 2 variables, write the whole structure into a file. The next thing to write in the file is the waveform itself.
To create it, first allocate some memory
.data
HEAP1 dd 0
.code
invoke GetProcessHeap
mov HEAP1,eax
Then, with the help of fsin compute the sinusoidal wave, write the buffer into the file,
invoke CloseHandle,file1 ; this is the wavefile
free buffer, and you're ready.
Here is some stuff I found a while ago on RIFF format. >> RIff Format
As well can't hurt looking through these postings >> Search Results (I've had my nose in almost all wave and sound related discussions ;) )
:alright:
NaN
As well can't hurt looking through these postings >> Search Results (I've had my nose in almost all wave and sound related discussions ;) )
:alright:
NaN
[b]WaveFile struct[/b]
[color=red] RIFF dd "FFIR" ; note that it's reversed. Do not modify
TotalSize dd ? ; fill later !
WAVE dd "EVAW" [/color]
[color=blue] FMT dd " tmf"
fmtsiz dd 16[/color]
format dw 1
channels dw 1
samplespers dd 44100
avgbytesps dd 88200
blockali dw 2
bitspersa dw 16
[color=blue]datum dd "ATAD"
datumsiz dd ? ; fill later![/color]
wavedata db WaveBytes dup (?)
[b]WaveFile ends[/b]To help thinks get more clear, I spaced/indent/colored the different header areas so it should now be very clear what Ultrano has given you, and how it coresponds to the RIFF format I linked to above.
Best of luck!
:alright:
NaN