4-channel sound

andreas · 28 July 2006, 19:10

This topic may be of public interest, hence I decided not to PM Toni about it.

4-channel sound.

At least on my box this doesn't work - I may rather express it the Simon & Garfunkel way, "Sound of Silence"

Yes, that's what you hear. :P

What speaker system do I need for this to work?
After enabling this, WinUAE instantly jumps to "Sound-DISabled" setting; looks it detects my hardware not suitable for that...?

amiga · 28 July 2006, 19:30

@andreas:

Just select Stereo sound.

andreas · 28 July 2006, 19:39

Funny answer

Yes, stereo sound works, but I also want to test out 4-channel sound, if you allow :P

amiga · 28 July 2006, 19:41

Why bother with 4 channels when you can overcome this limit?

For an experiment:

choose a frequency of 44100 Hz, with Stereo sound; then play an MP3 through Paula, NOT AHI (Eagle player is good at it). After that play the same MP3 through AHI.
They should sound the SAME.
In practice, Paula should have overcome the 4-channels limit.
(Correct me if I'm wrong, Toni!)

Toni Wilen · 28 July 2006, 21:19

Stereo = 4 paula channels are mixed to 2 physical output channels.

4-channel = 4 paula channels are _not_ mixed but output directly to 4 physical outputs. (mostly useless feature really..) You probably need "5.1" or better sound card.

andreas · 28 July 2006, 23:18

Thanks Toni, that might explain it.
I have a good ol' Live! Value.

You have one guess why I am so interested in this feature: stereo sounds a bit weird with my Sonix tracks, i. e. damn different to a real 1084S.
At least I had a hope that it will sound more "Amiga" in true 4-channel mode.

Question #1: Is that hope realistic?

Question #2: Which stereo separation setting comes closest to a 1084S?

LocalH · 29 July 2006, 09:14

100% separation is like hardware - 0,3 on the left and 1,2 on the right. You may have to play with the output sample rate and interpolation to get a sound you like. Don't forget the audio filter settings, as well.

andreas · 29 July 2006, 15:21

Quote:

100% separation is like hardware - 0,3 on the left and 1,2 on the right.

What?
I do not understand what you mean, sorry.

thomas · 29 July 2006, 19:21

The Amiga has four sound channels (0, 1, 2 and 3). The first and the last (0 and 3) are on the left stereo channel and the two inbetween (1 and 2) are on the right stereo channel.

Well, the official documentation says that 0,3 are on the right and 1,2 are on the left. But because the A500, which has them swapped, is the most famous Amiga ever, it has become the unofficial standard.

andreas · 30 July 2006, 12:46

OH SORRY. I managed to read a comma "," as a decimal point (in Germany, the decimal point is replaced by a comma, i. e. 1.125 (nine eighths) becomes 1,125, easily misread as "one thousand one hundred twenty five")

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
A600 right sound channel not working	tomcat666	support.Hardware	8	06 June 2013 08:56
My Retrogaming YouTube Channel	Djay	Retrogaming General Discussion	28	26 May 2013 15:19
CDTV : Sound Problem (One channel saturated)	gibs	support.Hardware	75	18 May 2010 15:41
Left sound channel on A1200 gone	8bitbubsy	support.Hardware	61	06 October 2009 00:57
Ability to turn one sound channel on and off	MethodGit	request.UAE Wishlist	11	28 January 2004 22:40

28 July 2006, 19:10	#1
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	4-channel sound This topic may be of public interest, hence I decided not to PM Toni about it. 4-channel sound. At least on my box this doesn't work - I may rather express it the Simon & Garfunkel way, "Sound of Silence" Yes, that's what you hear. :P What speaker system do I need for this to work? After enabling this, WinUAE instantly jumps to "Sound-DISabled" setting; looks it detects my hardware not suitable for that...? Last edited by andreas; 28 July 2006 at 19:15.

28 July 2006, 19:30	#2
amiga Registered User Join Date: Aug 2004 Location: Amiga_land Posts: 443	@andreas: Just select Stereo sound.

28 July 2006, 19:39	#3
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	Funny answer Yes, stereo sound works, but I also want to test out 4-channel sound, if you allow :P

28 July 2006, 19:41	#4
amiga Registered User Join Date: Aug 2004 Location: Amiga_land Posts: 443	Why bother with 4 channels when you can overcome this limit? For an experiment: choose a frequency of 44100 Hz, with Stereo sound; then play an MP3 through Paula, NOT AHI (Eagle player is good at it). After that play the same MP3 through AHI. They should sound the SAME. In practice, Paula should have overcome the 4-channels limit. (Correct me if I'm wrong, Toni!)

28 July 2006, 21:19	#5
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,506	Stereo = 4 paula channels are mixed to 2 physical output channels. 4-channel = 4 paula channels are _not_ mixed but output directly to 4 physical outputs. (mostly useless feature really..) You probably need "5.1" or better sound card.

28 July 2006, 23:18	#6
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	Thanks Toni, that might explain it. I have a good ol' Live! Value. You have one guess why I am so interested in this feature: stereo sounds a bit weird with my Sonix tracks, i. e. damn different to a real 1084S. At least I had a hope that it will sound more "Amiga" in true 4-channel mode. Question #1: Is that hope realistic? Question #2: Which stereo separation setting comes closest to a 1084S?

29 July 2006, 09:14	#7
LocalH Amiga user since 1990 Join Date: Aug 2004 Location: Kingsport, TN / USA Age: 44 Posts: 295	100% separation is like hardware - 0,3 on the left and 1,2 on the right. You may have to play with the output sample rate and interpolation to get a sound you like. Don't forget the audio filter settings, as well.

29 July 2006, 19:21	#9
thomas Registered User Join Date: Jan 2002 Location: Germany Posts: 6,985	The Amiga has four sound channels (0, 1, 2 and 3). The first and the last (0 and 3) are on the left stereo channel and the two inbetween (1 and 2) are on the right stereo channel. Well, the official documentation says that 0,3 are on the right and 1,2 are on the left. But because the A500, which has them swapped, is the most famous Amiga ever, it has become the unofficial standard.

30 July 2006, 12:46	#10
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	OH SORRY. I managed to read a comma "," as a decimal point (in Germany, the decimal point is replaced by a comma, i. e. 1.125 (nine eighths) becomes 1,125, easily misread as "one thousand one hundred twenty five")

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)