Default Sound Device Frequency Generation

[Tom Carlson]

I'm fairly new to PowerBasic, and haven't programmed Windows in 10 years, so please don't assume I know anything at all.

I need to take control of the default audio device in windows, and tell it to play a certain frequency.

At the end of the day, I'll be using PowerBasic to generate audio tests to use in our Chinese factory when doing Q/A on speaker systems. I'll be generating frequency sweeps, doing impulse response, etc.

But for now, I need to make a sound! I think once I get that far, I'll be on my way.

I assume I need to interface with some windows library and make calls to that... But as a new Power Basic user, even that is something a quick example would really help me out.

Thanks a lot.

Tom

[Mel Bishop]

Here's a EuroSiren I wrote. This may help get you started.

#INCLUDE "win32api.inc"

FUNCTION PBMAIN () AS LONG
    LOCAL COUNT AS LONG

    DO
    IF INKEY$ = CHR$(27) THEN EXIT LOOP
    INCR COUNT
    IF COUNT > 5 THEN EXIT LOOP
    winbeep  500,300
    winbeep 1000,300
    LOOP

    END FUNCTION

In as far as "taking control".....Hmmm...Even if it's possible, you may want to reconsider your options.

[Tom Carlson]

Not Sound Card

Thanks for the reply. I actually had seen this from my initial search of the forum. Very fun!

It only uses the PC's internal chassis speaker, however. I'm after something that accesses the Windows Default Audio Device, which could be your USB Headset, your sound card, etc.

[Paul Dixon]

Tom,
for an example of creating arbitrary frequencies of your choice , see here:

http://www.powerbasic.com/support/pbforums/showpost.php?p=288481&postcount=5

Paul.

[Guy Dombrowski]

PBCC Windows sounds

Tom,
You can use any AVI file in PBCC with this command

PlaySound "Anyfile.avi", 0, %SND_ASYNC

I use it to play standard Windows warning sounds in my graphic Console programs

[Mel Bishop]

It only uses the PC's internal chassis speaker, however...

Hmmm, It plays just fine on my PC's speakers. What kind of setup are you working with?

Also, as noted, you can also use MCISENDSTRING and/or PLAYSOUND. Plenty of examples in the source code forum.

Enjoy.

[Tom Carlson]

Mel and Guy,

Thanks! I had seen playsound, but discarded it as not relevant to my problem. I didn't know it could play from memory as well as a file.

At some point, I would like to record, control volume, and do other audio device related activities, but for now, I can generate frequency sweeps with this, much less painfully (I've been reading directx stuff) then I had feared.

Thanks!

[Peter Lameijn]

At some point, I would like to record, control volume, and do other audio device related activities

See: http://www.powerbasic.com/support/pb...light=mixerapi

[Arthur Gomide]

Peter,

Great program! Is there any chance that you include a dialog to select the sound card? My pc has three of them, one on board and two USB. This is very deep to me ...

[Peter Lameijn]

Posted an adapted version: http://www.powerbasic.com/support/pb...11&postcount=7

[Arthur Gomide]

Peter,

Great work, thanks!

Edited:

Ooops! See the results with:
1- on board sound
2- on board and one USB card
3- on board and two USB cards (same brand)

[Peter Lameijn]

According to Patrice Terrier it seems that Vista and Windows 7 no longer support the MixerApi...
(I never tried; I'm using W2K overhere...)

[Arthur Gomide]

The info of Mr. Patrice Terrier is relevant but I'm using XP SP3.