Question about deflemask/Sega tracker.
BotB Academy Bulletins
Level 9 Mixist
post #91977 :: 2017.11.08 6:05am
Where do you guys get the sound for the psg/sn channels from?

Is there like a sound pack for those channels?

I've noticed the fm channels can use tfi files and it's easy to find rips from games.

But how do you all work with the other psg/sn that usually emulates a hi hat or help the fm channels to finish a chord or add more depth to the melody?

Thanks in advance :)

Level 17 Chipist
post #91980 :: 2017.11.08 8:40am
I make all sounds myself minus the traditional C64 drums!

Level 9 Mixist
post #91981 :: 2017.11.08 9:48am
Ah I see :).
Level 27 Hostist
post #91982 :: 2017.11.08 11:23am
IIRC deflemask has some shitty bug where if you play a pulse in SN channel 3 then you can't have noise in SN channel 4 :(
Level 12 Criticist
post #91983 :: 2017.11.08 2:20pm
  raphaelgoulart and MiDoRi liēkd this
Pulses come from noise channel, so of course you cannot have both at the same time. Now if you mean just tones then there must be a mode where you can have 3 predefined noise/pulse pitches on 4th along with tone on 3rd channel like how most SMS games do their schit. 4th channel can steal freq from 3rd if more than 3 pitches is needed, nothing on the chip prevents one from doing sound on both 3rd and 4th channel, though the combination is normally not useful musicwise.
Level 23 Chipist
post #91987 :: 2017.11.08 6:43pm
If you have your own copy/rips of Sonic the Hedgehog, play it in an emulator and mute all of the FM tracks. That's the basic way to use it.

Really high notes on the pulse channels sound like a triangle. I can make a better sounding triangle in FM, but then I'd lose an FM channel.

White noise can be made to sound like a hi hat if you have a fast attack (try 8 4 0 as the volume envelope) or a shaker/cabasa (try 1 2 3 4 5 4 3 2 1 0 )

It's all about being able to listen critically and getting to know what your chips can do as instruments.
Level 9 Mixist
post #91993 :: 2017.11.09 4:49am
Thanks :). I'm understanding the psg/sn channels better now!
Level 9 Playa
post #91999 :: 2017.11.09 1:07pm :: edit 2017.11.09 1:09pm
  Apsarah hæitd this
  raphaelgoulart liēkd this
Puke7, it is not a bug, it is just like how the chip works.
The noise channel have only 4 independent frequencies, but also it can "steal" the frequency register from channel 3 but turning it off.

Those modes can be set by using the effect 20xy - Change Noise Mode. It is explained in the manual!
Level 12 Criticist
post #92003 :: 2017.11.09 1:35pm
  Apsarah liēkd this
Ch3 doesn't get turned off if 4th uses its freq (but using both at the same time doesn't sound all that great either for the most part).
Level 20 Chipist
post #92007 :: 2017.11.09 3:29pm
  MiDoRi liēkd this
Delek lives
Level 17 Chipist
post #92034 :: 2017.11.10 10:22pm
  Apsarah hæitd this
  raphaelgoulart liēkd this
Delek is right though - the same issue happens in VGM MM - it's a quirk of the chip sadly.
Level 19 Criticist
post #92036 :: 2017.11.11 8:20am
  Apsarah liēkd this
This is false. Ch3 does NOT turn off when Noise freq is set to CopyC.
Level 17 Chipist
post #92039 :: 2017.11.11 10:18am
Lmao this thread HAHAHAHA
Level 17 Chipist
post #92040 :: 2017.11.11 10:28am
It's not a quirk of the chip, it's bad emulation, period, end of discussion. Trying to officially sell bad emulation as a "hardware quirk" in a forum for retro soundchips doesn't sound like the best idea to me to be honest. And i wouldn't be making this comment if it was the first time something funny and fishy like that happened
Level 17 Chipist
post #92041 :: 2017.11.11 10:31am
  th4 D34D liēkd this i can also make a HW recording if further proof is necessary (it isnt't)
Level 27 Renderist
post #92042 :: 2017.11.11 10:47am :: edit 2017.11.11 10:48am
  Apsarah liēkd this
with clever manipulation through Sneventracker you can also play different frequencies between CH3 and CH4; as the frequency value command of CH4 seems to be "pay attention" or "ignore" CH3.
Level 17 Chipist
post #92045 :: 2017.11.11 12:00pm :: edit 2017.11.11 12:01pm
=OOO i wrote You on IRC but i guess You're offline (please elaborate here or in savespam! that sounds too interesting not to hear more about it =3 )
Level 27 Hostist
post #92049 :: 2017.11.11 1:39pm
  Diagamblic and Apsarah liēkd this
I finally found the source of my confusion (and it's mostly because I didn't read it correctly). From the manual:
"A maximum of 4 notes can be sounded on the SN76489 if the noise mode is not in the special mode, if it is, a maximum of 3 notes can be sounded."

I misinterpreted this somehow as there are 4 default pulse channels and noise mode is something special which is not the case. It also doesn't state that the 4th channel IS the noise channel. But I should know that already instead of being a n00b.

The SN76489 datasheet
says nothing about the 3rd channel going mute when the noise channel references it. That would have cost more during fabrication and it would make sense for Texas Instruments not to include it.
Level 17 Chipist
post #92065 :: 2017.11.11 4:59pm
i hope these will be treated like the substantial constructive complaints they are! there is always room for improvement if people are open, honest and keeping an (undefined) amount of respect for another.. Excuse my tone from earlier, yet it really is not the first time something like this happens =P

LOGIN or REGISTER to add your own comments!