Jump to content
First Spear

Intellivision Stereo? ECS?

Recommended Posts

Can anyone that has done the stereo hardware modification on the Inty say how it works, or if it sounds remarkably different from the mono output? Just wondering if AY-3-8910 channel 0+1 come out of the "left" and 2 comes out of the right, for example? And how does stereo sound with the ECS? Also, would it be worth it if jzIntv had stereo output?

Share this post


Link to post
Share on other sites

I think for a stereo mod to be worthwhile, you'd need a game written to take advantage of it properly.  Otherwise, you'd just get weird separation on sound effects and music.

 

For example, Space Patrol would have its baseline on one speaker and its drums on the other, while most of the sound effects randomly hopped between the two.

 

A proper stereo game would likely treat the two PSGs as a 3-channel system, with different volume settings on the two PSGs to position sounds more subtly.

  • Like 1

Share this post


Link to post
Share on other sites

I commented on something like this elsewhere not many months ago. The horror example is the Amiga with its 4 channel DMA sound, split as two channels on the left and two channels on the right. If you use stereo speakers reasonably close to eachother, it can be fine but if you listen to modules through headphones or speakers set wide apart, it sounds so weird. Just like intvnut explains, depending on how the programmer/musician used the sound chip you might end up with bass in one ear and drums in the other, and sometimes a melody that wanders across the two, not to mention sound effects.

 

I think a modern solution would require a mixer that perhaps mixes one channel 75/25, one channel 50/50 and the third channel 25/75. You would still get spatial stereo effects, but not as bad as with 100/0, 50/50, 0/100. Or of course if you can mix all three 50/50 but then again that is the same as taking the mono output and split into two identical channels so no stereo at all.

 

I don't know how anyone have modified their existing Intellivision in regards of this, or why one would do it in the first place. I fully get composite, S-Video, RGB modifications to get a clearer picture, but splitting the sound in any way generally won't make it sound better.

Share this post


Link to post
Share on other sites

If someone moved the two PSGs into an add-on board that had a programmable analog mixer, that could be interesting.  (And, the default, of course, should be to mix all channels on both speakers at full.)

 

The PSG actually has 3 analog outputs, one for each channel.  With both PSGs present and a programmable analog mixer, you could do some nice stereo positioning across the 6 channels as part of sound effect or music generation.  If they were granular enough, you could even have sound effects whose apparent stereo position tracks with the position of objects on the screen.

 

That said, the Mockingboard for the Apple ][ had two PSGs with one wired to left channel, and one wired to right channel.  As I said previously, you'd treat that as a 3-channel system and program different volume levels in the two PSGs to place sound effects between the two speakers.

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...