C / C++ / MFC Discussion Boards

Mika Soukhov31-May-02 10:01

31-May-02 10:01

Hello
Not a long ago I got a task to write a programm, that solve a frequency of sound card. All colculations must do in real-time.
It's a my first project of that type and I not totally undestand how do it. May be it's programm had already done In this case would you be so kind as to write a text of programm or send to my e-mail.
Beforehand thanks for all.

Re: Frequency of sound card

Ed Gadziemski31-May-02 11:07

Ed Gadziemski

31-May-02 11:07

I'm not clear what you're asking. What do you mean "solve a frequency of sound card"?

Re: Frequency of sound card

Mika Soukhov31-May-02 12:49

Mika Soukhov

31-May-02 12:49

Sorry, I mean calculate a frequency of sound card.

Re: Frequency of sound card

Mike Nordell1-Jun-02 0:11

Mike Nordell

1-Jun-02 0:11

It still doesn't make sense. A sound card has no frequency since it's not a waveform. Perhaps if you told us what you really want to know about the soundcard someone could tell you.

Re: Frequency of sound card

Mika Soukhov1-Jun-02 4:16

Mika Soukhov

1-Jun-02 4:16

Sound is consist of many frequencies. Spicer has only one frequency. I need to find the total value of frequencies. Have you ever seen WinAmp? In this porgramm use this tecnilogy. We can see a waveform.
How can I get it?

Re: Frequency of sound card

Mike Nordell1-Jun-02 7:47

Mike Nordell

1-Jun-02 7:47

I'm still not sure if you want the FFT spectral analysis or just the oscilloscope-like view. For the latter you only need to sample the amplitude and display (or whatever you want to do with it).

But without any further information on what your requirements are it would still be guesswork.

What exactly do you want to be able to do? Do you want to be able to capture a perfect digital copy, or is it OK to loose a couple of samples here and there? Do you
need to capture the sound played from any program (probably needs kernel hacking), or do you have access to the (source code to) the program that is to play the sounds?

Re: Frequency of sound card

Mika Soukhov1-Jun-02 10:09

Mika Soukhov

1-Jun-02 10:09

For example we attached a microphone and shouting to it.
In the monitor must be animation of wave that utter from us.
With help this we can automatically colculate the frequency of sound
How can it do?
In the beginning we can use the MP3 file.

Re: Frequency of sound card

Mike Nordell1-Jun-02 20:52

Mike Nordell

1-Jun-02 20:52

For example we attached a microphone and shouting to it.

Ahhh, that's quite simple. Have a look at any of the sound recording examples. There are quite a few samples of this around the 'net, not to mention there is at least one sample in MSDN.

To plot your curve you just use the sample value as the y-axis and your time-step as the x-axis (probably wrapped at the right edge of your view). The same for analyzing a stored sound that your program is playing.

But to do this for another application playing a sound, no matter what API that app is using, I think you're either looking at some kernel hacking, or a simple analogue cable between your soundcards output to its input (so that you can get the sound recorded - you can AFAIK only record incoming sounds, not outgoing).

++luck;

return Recordset

Max Santos31-May-02 9:46

Max Santos

31-May-02 9:46

How can i return a recorset from a Stored procedure ?

rs = Cmd1->Execute(NULL,NULL,adCmdStoredProc);

why is this allways returning a closed recorset?

thanks

Casa.Sapo.pt

Re: return Recordset

Le centriste31-May-02 12:09

Le centriste

31-May-02 12:09

Max... Santos wrote:
How can i return a recorset from a Stored procedure ?

Every SELECT statement in a stored proc generates a recordset (except SELECT statements that assign their columns to local variables). You can navigate through the recordsets using the NextRecordset method.

Max... Santos wrote:
why is this allways returning a closed recorset?

If the SELECT statement returns no rows (or there is no SELECT statement), it returns a closed recordset.

Michel

It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.

- TreeBeard

Re: return Recordset

Max Santos31-May-02 12:22

Max Santos

31-May-02 12:22

the stored procedure works fine now Smile | :)

but when I insert something in a temporary table inside the sto proc, it stops working and the recordset is closed

create table #x(value Text)
insert into #x values('')

Casa.Sapo.pt

Re: return Recordset

Le centriste31-May-02 12:30

Le centriste

31-May-02 12:30

Maybe you could use a secondary stored procedure to do your INSERTs? Just a suggestion.

Michel

It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.

- TreeBeard

VS .NET and RichEdit 2.0 Control

dazinith31-May-02 9:35

dazinith

31-May-02 9:35

if i drag a 'Rich Edit 2.0 Control' onto any of my CDialog based forms and then call DoModal() the dialog never appears.. if i take the rich edit out and call DoModal() the dialog pops up fine..

i've traced through the code and the constructor is called both ways, but the OnInitDialog() is never called if a Rich Edit 2.0 Control is in the dialog.. ive tried it on 2 existing dialogs i have and it does the same thing both ways..

has anyone tried to use this rich edit control under .net? i've never used one before, but all im doing is draging it onto the dialog.. get rid of it and it the dialog works..

im really confused, i've had enough of this junk for this week.. Confused | :confused:

-dz

-edit-
p.s. im trying to write a dialog that takes a string (with multiple lines using '\n') and display it in a CEdit, or rich text control so that i can display some text to the screen.. and then have a print button which prints the text.. my problem is that when i set the CEdit to the string i get little boxes where the carriage returns should be.. so i thought i would try the rich edit control.. now that i cant get that to work im trying the cedit again, but i dont see a command to make it go to the next line.. any other suggestions?

p.p.s. poping up notepad would be fine too, but the commands to start a new process take about 10 parameters.

Re: VS .NET and RichEdit 2.0 Control

James R. Twine31-May-02 10:10

James R. Twine

31-May-02 10:10

dazinith wrote:
if i drag a 'Rich Edit 2.0 Control' onto any of my CDialog based forms and then call DoModal() the dialog never appears.. if i take the rich edit out and call DoModal() the dialog pops up fine..

Try calling AfxInitRichEdit() in your App's InitInstance() function. If you take a look at your output window (when running under the debugger), and see a "Dialog creation failed" or similar message, the above should solve your problem.

Peace!

-=- James.
"Some People Know How To Drive, Others Just Know How To Operate A Car."
(Try Check Favorites Sometime!)

Re: VS .NET and RichEdit 2.0 Control

Tomasz Sowinski31-May-02 10:09

Tomasz Sowinski

31-May-02 10:09

Check the KB article Q166132. Or just call AfxInitRichEdit before DoModal.

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: VS .NET and RichEdit 2.0 Control

Ed Gadziemski31-May-02 11:11

Ed Gadziemski

31-May-02 11:11

You need to use '\r\n' instead of '\n' for strings passed to CEdit.

Re: VS .NET and RichEdit 2.0 Control

dazinith31-May-02 10:27

dazinith

31-May-02 10:27

thanks a bunch Smile | :)

have a good weekend!

-dz

Excel and DAO - Getting currency prefixes in individual cells

achandra00731-May-02 9:09

achandra007

31-May-02 9:09

How do I get DAO to print currency codes in an Excel spreadsheet cells?

I created a spreadsheet using the CDaoTableDef object and then the one holding the account balances is created as:

TableDef.CreateField("Balance",dbCurrency,dbFixedField);

We have a mix of Canada and US Dollars. How do I get a cell to hold CAD and USD before the actual balance?

thanks
ashish

why why???

pnpfriend31-May-02 9:03

pnpfriend

31-May-02 9:03

Let me just post my code...
here the questions.

1)what IsAnyItemChecked will return by just looking at the code??
2)why running under 2000 return true and false under XP?
3) does the function need to change?if it has to change, where would it be?

oh... let me explaine what this two functions do
I have file tree control. so my tree contains folders and files name.
There are checkbox for each folder and file name. the following IsAnyItemChecked () call recursive function IsAnyItemChecked(...) to go through the whole tree and see any item (file in this case) is checked. if checked item found, check it's parent.
then return true for checked item found. if not the function will return false. that's it...

<br />
BOOL CSMPprojectDlg::IsAnyItemChecked()<br />
{<br />
  HTREEITEM hItem = m_TreeCtrl.GetRootItem();<br />
    <br />
  int result = IsAnyItemChecked(hItem,hItem);<br />
  return result;<br />
}<br />
<br />
// set the path  check if at least one of it's child is checked.<br />
BOOL CSMPprojectDlg::IsAnyItemChecked(HTREEITEM hItem, HTREEITEM &ParentItem)<br />
{ <br />
 <br />
  BOOL CheckItemFound = FALSE; // for uncheck<br />
  while(hItem!=NULL)<br />
  { <br />
    FileInfo *fileinfo = (FileInfo*)m_TreeCtrl.GetItemData(hItem);<br />
   <br />
    if(m_TreeCtrl.ItemHasChildren(hItem) || fileinfo->status == FOLDER)<br />
    {<br />
      IsAnyItemChecked(m_TreeCtrl.GetChildItem(hItem),hItem);      <br />
    }<br />
    if(m_TreeCtrl.GetCheck(hItem))<br />
    {<br />
     CheckItemFound = TRUE ; //TRUE for check<br />
<br />
    }     <br />
    hItem=m_TreeCtrl.GetNextSiblingItem(hItem);<br />
    <br />
   }//whileloop  <br />
<br />
   if(CheckItemFound == TRUE && m_TreeCtrl.ItemHasChildren(hItem))<br />
   {<br />
        m_TreeCtrl.SetCheck(ParentItem,TRUE); <br />
   }<br />
   <br />
   return CheckItemFound;   <br />
}<br />

Re: why why???

dazinith31-May-02 9:32

dazinith

31-May-02 9:32

int result = IsAnyItemChecked(hItem,hItem);

prolly has nothing to do with the problem, but you are setting an int to a bool result

return result;

then your returning the int as a bool..

thats the only obvious thing i see.

-dz

Re: why why???

pnpfriend1-Jun-02 5:49

pnpfriend

1-Jun-02 5:49

hmmm.. not really .. that's ok now.. i recode my function for xp and it is running under 2000 without error. but i'm still curious why.

Have your ever used debugger?

soptest31-May-02 9:46

soptest

31-May-02 9:46

No? Try to use one.

soptest

Re: Have your ever used debugger?

Tomasz Sowinski31-May-02 10:22

Tomasz Sowinski

31-May-02 10:22

What's debugger? Can I use it with Visual Basic?

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: Have your ever used debugger?

soptest31-May-02 13:32

soptest

31-May-02 13:32

Are you from Moon or Mars?

soptest

Re: Have your ever used debugger?

Tomasz Sowinski31-May-02 22:43

Tomasz Sowinski

31-May-02 22:43

soptest wrote:
Are you from Moon or Mars?

I'm from Mercury. And you?

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

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