Search found 263 matches

by jbperin
Mon Apr 19, 2021 6:02 pm
Forum: AY sound chip
Topic: Unphasing harmonics to rebalance sound samples distribution
Replies: 4
Views: 61

Re: Unphasing harmonics to rebalance sound samples distribution

Then I just changed the phase of the first and the third harmonic. The harmonics become: NotInPhaseHarmonics.png The only difference with the previous set of harmonics is that the first and the third one are "inverted" (i.e shifted by PI). And when I sum these sines waves, I get the following wavefo...
by jbperin
Mon Apr 19, 2021 5:53 pm
Forum: AY sound chip
Topic: Unphasing harmonics to rebalance sound samples distribution
Replies: 4
Views: 61

Re: Unphasing harmonics to rebalance sound samples distribution

Then I used Fourier to approach this signal with the following series of harmonic sine . InPhaseHarmonics.png When I sum the series of sine, I get : RebuildSquare.png which is a (not so bad) approximation of my initial signal. It would require an infinite series of harmonic to get a perfect square. ...
by jbperin
Mon Apr 19, 2021 5:47 pm
Forum: AY sound chip
Topic: Unphasing harmonics to rebalance sound samples distribution
Replies: 4
Views: 61

Unphasing harmonics to rebalance sound samples distribution

Hi all, I want to share with you all an idea that I got about sound sample replaying on an AY chip. I really don't know what it worth but I feel appealed by this idea. If you're not familiar with AY sound chip, you can leave now because the rest of the post is going to be somewhat hardcore. If you k...
by jbperin
Mon Apr 19, 2021 2:23 pm
Forum: AY sound chip
Topic: Oric's 8912 volume scale
Replies: 36
Views: 44131

Re: Oric's 8912 volume scale

iss wrote:
Thu Jul 21, 2016 9:11 am
osc.jpg
Oric-amp.jpg
Incredible !! you are able to visualize the signal that is outputed :shock:
That's so much valuable !!

iss wrote:
Thu Jul 21, 2016 1:56 pm
Additionally kind of info about math interpolation (in Czech language) can be found here and here.
I arrive too late .. they are now dead links :-(
by jbperin
Mon Apr 19, 2021 1:55 pm
Forum: Games
Topic: Los Caminos de Galdeon
Replies: 12
Views: 327

Re: Los Caminos de Galdeon

Looking forward to the next iteration of things Thank you ibisum. I'm glad that you like this lil game. I do think that there will be some new iteration but for now I'm going make a break on the 3D stuff. I want to explore the topic of sound on Oric. I think this is a good opportunity for a new kin...
by jbperin
Sun Apr 18, 2021 12:07 pm
Forum: Games
Topic: Los Caminos de Galdeon
Replies: 12
Views: 327

Re: Los Caminos de Galdeon

Congrats, @ jbperin ! Thanks for this new Oric game and your great work on Oric's 3D scene ;). The game is playable and I like very much how the color textures are rendered. Thank you iss It was a real pleasure for me to work on 3D over the past year. I learnt a lot by getting advices from Dbug for...
by jbperin
Sun Apr 18, 2021 8:27 am
Forum: Cross development tools
Topic: SampleTweaker
Replies: 3
Views: 61

Re: SampleTweaker

Isn't this tool the only way to prepare samples to be used with the digiplayer.s ? I think I can do something similar in Python .. and add a few options such as support of ogg, wav, mp3 .. And as it is possible to make exe from Python script, perhaps I can prepare an alternative to SampleTweaker . B...
by jbperin
Sun Apr 18, 2021 7:48 am
Forum: Cross development tools
Topic: OSDK 1.18
Replies: 6
Views: 3000

Re: OSDK 1.18

Is it possible, in future OSDK 1.19, to have a way to give parameter to preprocessor cpp.exe ?

It's just adding a %OSDK_Xxxx% to the cpp.exe command line in build.bat
by jbperin
Sun Apr 18, 2021 6:39 am
Forum: Cross development tools
Topic: SampleTweaker
Replies: 3
Views: 61

SampleTweaker

Hello

I can't find the documentation of the SampleTweaker program that comes with OSDK.

Is there any chance that this tool works with 8 bits samples dispatched on two channels?


Thanks
by jbperin
Sun Apr 18, 2021 6:32 am
Forum: Games
Topic: Los Caminos de Galdeon
Replies: 12
Views: 327

Re: Los Caminos de Galdeon

kenneth wrote:
Sat Apr 17, 2021 9:59 pm
El juego funciona muy bien! 8)
Gracias 😉
.
Chema wrote:
Sat Apr 17, 2021 11:15 pm
Thank you very much. Looking forward to playing it!
Well it's just a little fast escape game.
It could have been called "Yet another maze game for Oric" but the marketing department said that "Los camino's de Galdeon" sounds better.
by jbperin
Sat Apr 17, 2021 7:01 pm
Forum: Games
Topic: Los Caminos de Galdeon
Replies: 12
Views: 327

Los Caminos de Galdeon

Hi All,

A new Atmos game for spanish speaking people.

It's my first game :-)
splash_es.png
splash_es.png (87.77 KiB) Viewed 327 times
Menu.PNG
POG_OP1_es.tap
(43.95 KiB) Downloaded 21 times
Feedback, bug report, comments, suggestions are welcome.

This game use Castoric for the 3D.
by jbperin
Fri Apr 16, 2021 6:04 pm
Forum: AY sound chip
Topic: 2 eurocents question about AY-8912 possibilities
Replies: 23
Views: 25325

Re: 2 eurocents question about AY-8912 possibilities

jbperin wrote:
Fri Apr 16, 2021 6:01 pm

Is it possible to see the source code of this magic ?
Yes .. I realize it is already on my hard drive LOL !!! :D
by jbperin
Fri Apr 16, 2021 6:01 pm
Forum: AY sound chip
Topic: 2 eurocents question about AY-8912 possibilities
Replies: 23
Views: 25325

Re: 2 eurocents question about AY-8912 possibilities

Dbug wrote:
Fri Apr 16, 2021 5:30 pm
that's what I did in NyAtmos and OricTech


waou !! :shock:

How the hell is that possible to play sampled music on interrupt (100Hz) ?

That's not PCM.

Is it possible to see the source code of this magic ?
by jbperin
Fri Apr 16, 2021 5:01 pm
Forum: AY sound chip
Topic: 2 eurocents question about AY-8912 possibilities
Replies: 23
Views: 25325

Re: 2 eurocents question about AY-8912 possibilities

feel free to experiment :) You should not say things like that to someone who is struggling to find the courage to finish a game. That is not kind of you. My idea was to find an encoding to basically generate a series to write on A, B, C, A, B, C, A, B, C, ... computing the best combination of valu...
by jbperin
Fri Apr 16, 2021 1:15 pm
Forum: AY sound chip
Topic: 2 eurocents question about AY-8912 possibilities
Replies: 23
Views: 25325

Re: 2 eurocents question about AY-8912 possibilities

Dbug wrote:
Thu Apr 15, 2021 8:36 pm
On msx they did exactly that, using some Viterbi encoding.
https://www.msx.org/forum/development/m ... s-poor-psg
That's truly fascinating ..

What an interesting approach !!

Do we have the same on Oric ?