OAK sampler

This project is a full reverse engineering effort, not a simulation. A large amount of the work involves bus and trace analysis, logic analyzers, custom pcb tools to interface the ASR etc some destructive along with building the new HW platform. I’ll post more videos as development goes, including loading and running original Ensoniq demo CDS.

C'est pour la partie analogique (préamp, sorties analogiques) qu'il faut aussi recréer, et là, je ne sais pas exactement ce qu'il a fait.

To answer the question on DP4, yes the ASR-10 has essentially a DP inside for effects. The OAK is the same and can be used as a standalone Fx processor just like the ASR-10.

I personally like individual outs. The ASR-10 is really made to output all the channels anyways. It always outputs the audio; it just doesn’t have the DAC connected. So I added an internal OEX-6sr and DACS for additional outputs. So a total of 4 outputs.

Physically I’ve added pitch and mod wheels and wood sides. As far as existing disks, I’ve bought a few original Ensoniq CD’s (one disk is lost in the mail still ) The projects and sounds on those play accurately so all the old disks will work.

External Effects Disks and CD’s work in the example I’m using Ensoniqs 44khz effects of their CDR-3, But I’ve also used the Waveboy's Resonant Filter (Epic with the minimoog Preset) and their Granular effects.

I built another analog board revision. When sampling or live monitoring the ASR-10 slightly hits analog saturation before digital clipping which allows it to sound musical in the red. I’m doing the same in the analog domain, similar opamp configuration but not the same. For the above video second half it’s slightly in the red the whole time. Fun fact on the ASR-10 the volume attenuation is digital. To save parts they its uses a volume block on their dsp. Which results in reduced fidelity if not at full volume. OAK-S mirrors this. I have a headphone preamp as well.

For other work the ASR-10 has dual footswitch capabilities but one is always a sustain pedal. For the OAK-S I have it using a single pedal that’s configurable. It will work with Ensoniq or Roland Pedals. No CV or patch select pedals to keep it compact.

I’ve been ramping up to build the first small production run soon.

It’s using several processors. Mostly ARM.

Yes it uses SCSI protocol. The CD is copied to a usb flash drive and it mounts as a scsi drive. It’s the same for floppy disks.

Citation de Coyote14 (voir le message) :

C'est pour la partie analogique (préamp, sorties analogiques) qu'il faut aussi recréer, et là, je ne sais pas exactement ce qu'il a fait.

Il semblerait que ce soit une combinaison de processeurs ARM faisant tourner la ROM originale de l'ASR-10 ou un reproduction à iso-fonctionnalités de celle-ci, et d'une partie analogique développée pour. Mais il y a un doute sur le comportement de l'interface pas identique à 1:1 avec celle l'ASR-10 et la disparition des boutons Patch Select, qui ne militent pas pour le fonctionnement à partir du firmware d'origine (et de potentiels problèmes de propriété intellectuelle avec Creative Labs).

https://gearspace.com/board/electronic-music-instruments-and-electronic-music-production/1463019-oak-hardware-sampler-asr-10-revisited-2.html#post17808646

Citation :

To answer the question on DP4, yes the ASR-10 has essentially a DP inside for effects. The OAK is the same and can be used as a standalone Fx processor just like the ASR-10.

I personally like individual outs. The ASR-10 is really made to output all the channels anyways. It always outputs the audio; it just doesn’t have the DAC connected. So I added an internal OEX-6sr and DACS for additional outputs. So a total of 4 outputs.

Physically I’ve added pitch and mod wheels and wood sides. As far as existing disks, I’ve bought a few original Ensoniq CD’s (one disk is lost in the mail still ) The projects and sounds on those play accurately so all the old disks will work.

Citation :

External Effects Disks and CD’s work in the example I’m using Ensoniqs 44khz effects of their CDR-3, But I’ve also used the Waveboy's Resonant Filter (Epic with the minimoog Preset) and their Granular effects.

I built another analog board revision. When sampling or live monitoring the ASR-10 slightly hits analog saturation before digital clipping which allows it to sound musical in the red. I’m doing the same in the analog domain, similar opamp configuration but not the same. For the above video second half it’s slightly in the red the whole time. Fun fact on the ASR-10 the volume attenuation is digital. To save parts they its uses a volume block on their dsp. Which results in reduced fidelity if not at full volume. OAK-S mirrors this. I have a headphone preamp as well.

For other work the ASR-10 has dual footswitch capabilities but one is always a sustain pedal. For the OAK-S I have it using a single pedal that’s configurable. It will work with Ensoniq or Roland Pedals. No CV or patch select pedals to keep it compact.

I’ve been ramping up to build the first small production run soon.

Citation :

It’s using Mais en l'occurrence on ne voit jamais l'électronique en cours de développement alors qu'il semble encore y avoir des itérations dessus. Et le concepteur reste très évasif sur l'architecture, pour un produit qui semble très prochainement partir en production. Ce qui pourrait indiquer qu'il s'agit avant tout de beaucoup de logiciel, issu des émulation MAME tournant sur un Soc Raspberry générique simulant également les bus pour l'interface utilisateur, le clavier, le stockage (genre Gotek et ZuluSCSI)... Et d'une carte analogique propriétaire pour imiter les idiosycrasies des E/S de l'original.

Très intéressant
Et très technique 🙂

Donc voilà, je pense qu'on sait tous déjà que la partie analogique ne sera pas identique, bien qu'elle puisse émuler le grain de l'Asr10