Comments by Member 8244358 (Top 34 by date)

This is my Vb.Net Code:
Dim tbar as short
Private Sub TrackBar1_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TrackBar1.Scroll

tbar=Trackbar1.Value

Select Case tbar
Case 1
Dim filestream1 as new filestream("C:\x.wav", FileMode.Create, FileAccess.Write)
Dim writer as new binarywriter(filestream1)
------Code for creating wave file named "x.wav"-------
writer.close()
filestream1.close()
AxWindowsMediaPlayer1.URL = "C:\x.wav"
AxWindowsMediaPlayer1.Ctlcontrols.play()

Case 2
Dim filestream2 as new filestream("C:\x.wav", FileMode.Create, FileAccess.Write)
Dim writer as new binarywriter(filestream2)
------Code for creating wave file named "x.wav"-------
writer.close()
filestream2.close()
AxWindowsMediaPlayer1.URL = "C:\x.wav"
AxWindowsMediaPlayer1.Ctlcontrols.play()

End Sub

In both these cases I am modifying the sample values in different ways, however, naming the wav file as "x.wav".
The code produced correct results but when I use WindowsMediaPlayer, it gives error of "is used by another process". On the other hand, when I use-
My.Computer.Audio.Play("C:\x.wav")
then I get accurate results.
Can you tell me what is the problem with using WindowsMediaPlayer?

Okay, then I'll try to give it shot and then let you know. Thanks :)

so do you mean that I should create a playlist and each time add the same wave file, that I modify, to that playlist and then use your code? Am I right?

Yes, your suggestion worked for me. I am able to overwrite the two files now. I was only using
binarywriter.flush()
and not
binarywriter.close().
Now I am using both and it works fine.


My next question is how do I make Windows media player shift from playing the first wave file to another on clicking second button and back to first wave file on clicking first button, since the wave file name in both the cases is the same?

yes, i am using Filestream method and i am also closing the binarywriter and filestream using the following code:

binarywriter.close()
filestream.close()

But it is still giving me error!

and these conversions made me do the project in a much simpler and faster way.

actually it is what my project is all about! i have to modify the samples of wav and create a new file using those samples.

I have another question as well. Now I am applying a window function on selected samples of the wav file but in this case i don't know how many samples will be modified at the run time (this is how my processing goes)! Right now, I am modifying these samples in a loop and using a list (of short) to add each modified sample. Then i am converting list into array of short and then byte array and again memory stream and this is how i get to create a new wav file. I want to know whether i am doing the things right? If not, is there any other solution of this problem? Thanks in advance!!

actually i got a new idea where i m converting array of Short values into a byte array, and then writing these byte values into a memory stream. The final wav file can be created using the memory stream. :)
But I appreciate your suggestion. it was of great help too. thanks a lot.

ok..i'll give it a try then.

thanks, i am already doing that. Do i need to convert the samples into little endian format? if yes, then how can i accomplish that?

Is there any other way to do the things?

First of all, thanks a lot for your kind help.
Basically, in order to make the things simpler, I tried to create a very simple application which is to make a new wav file same as original. Yes, I agree with all what you said. But I still want to know whether I am doing the things in the right way or not!

Can u pls reply?

Well, before you have another cup of coffee..I think I should explain the working of my project step-by-step :D
1. I read a 16-bit Single-channel wav file.
2. Its header values such as Chunk-size, chunk Id, sample-rate, format, etc. are being read into separate text-boxes.
3. The data samples (that always begin at position 44 in a wav file) are being read as bytes and these bytes are written into a textfile.
4. So far I have not processed them as I am working to create a new wav file, exactly the same as original.
5. Now in the code for another button, I am using a binary writer to write the header of the new wav file that I want to create. I took that code from www.codeproject.com itself.
Note: So far, the code is working fine.
6. Now I want to add data to the new wav file starting at position 44. This data I have already saved in the textfile (as mentioned in step 3).
So, I am stuck at step 6.
I hope now there will be no confusion. I'll be really-really thankful, if somehow you can explain me the code for step 6. Thanks is advance!! :)

Also, i get this type of values (Int16) if I read original wav using ReadInt16 function:
2
-2
2
-2
1
0
0
0
0
-1
2
-3
4
-5
5
-3
0
2
-3
3

Yes, I need to create a file, write WAV headers, and then append the binary data from the TXT file.
thank GOD you finally got my question.. hehe.. :D
Anyway, I am able to create the wav file using byte array now. And it plays too. But now the problem is that my wav file plays but there is a very Heavy Distortion. What do I do? I've been working on this problem for 2 months.

Yes I am actually doing some processing on the wav data samples. That is why, i am using textfile (as a database you can say). And in that textfile, i am only storing the data sample values. I am writing the header values using binary writer. There are no issues in writing the header values. The problem is just data samples.

Right now, my textfile contains the data like this:
255
255
2
0
254
255
2
0
254
255
1
0
0
0
0
0
0
0
0
0
255
255
2
0
253
255
4
0
251
255
5
0
253
255

Lol :D
Actually I am using byte values to create the copy of a wav file. As wav file data is in Little Endian format, my problem is that I am not getting how to create the wav file from byte values stored in a textfile (The textfile contains original wav samples as byte values and i am creating a copy of original wav file).

This code works but still I am not getting the exact values

i am able to read the fle into byte array, but not able to convert byte array into an array of Int16 values

thanks for your code..but i am still not getting the exact values. yes, i want the values in Little Endian format. But actually i am working with wav files. I am reading a wav file into a byte array and want to create a copy of original wav file using the same byte array. Can you suggest me how do i do it? I am using the following code:

Public Function streamfile(ByVal filename As String) As Byte()

Dim fs As New FileStream(filename, FileMode.Open, FileAccess.Read)
Dim data(fs.Length) As Byte
fs.Read(data, 0, System.Convert.ToInt32(fs.Length))
fs.Close()
Return data

End Function

Dim bytes() As Byte = streamfile("C:\filename.doc")
fw.Write(bytes, 0, bytes.Length)

hope u will understand my question better.

i want to convert an array of byte values into an array of short. i know that 2 bytes = 1short. But i am not able to do it properly even after searching a lot on Google.