Full speed PS1 games... Why can't I run them?

[Jackyya]

I successfully modded a New 3DS XL. I'm happy that I can play all GBC/GBA/NDS/3NDS games, and I can't do it using NSUI and bring the icon on menù (I love it).

Same as NSUI, I tried with PS1 Forwarder Creator to create CIA from .chd files of PS1. These games don't run at full speed and they are ALL without audio. Or maybe some games are with soundtruck but without special effect (example: Tenchu without sound of the sword when using but with soundtruck (soundtruck that lag, of course)).

So, sadly, I tried using RetroArch (.cia, which install PCSX reArmed), which prevent to have games icon on menù but it was ok it games run at full speed (I thought XD). I followed guide on youtube to avoid mistake and games still don't run as they should (I tried loading .chd, .bin, .cue).

Example: Bubble Bobble runs ok, with sound and effect, but Tenchu (even if now sounds are ok) still don't run at max speed when enemy are on screen, and text/audio are not synchronized and still laggy when cutscene...
Even Tombi! (also knows as Tomba! in US) don't run at full speed and also audio is laggy... and in some part of the game (I only tried the very first part since the experience was awful) it becomes very laggy and unplayable (this is the game I want to play most).

Am I missing something or this is the final experience?
Best solution would be to have icon on 3ds menù but most important is that I can run PS1 games full speed.

I'm searching for desperate help!

 

[Freqman]

try going in the Universal Updater app, and find the app called DSP1 (or go and find DSP1.cia somewhere.. Install that, run it once and it deletes itself)
its the dsp audio plugin thing, it works with retroarch for psx emulation, once you have it installed you might have to enable it in your retroarch settings, im not too sure where it is anymore. I remember you had to set the audio to DSP_Thread, its in there somewhere just look thru the option. Once thats done you might have to re-start retroarch or re-load your game. I only had to do it once after i installed DSP1.cia, and never had to mess around with it since.

Anyways, that fixed a lot of my speed problems and now a lot of games run fine like ff7, even metal gear.

 

[PoorPocketsMcNewHold]

Have you tried to turn on the New 3DS L2 cache and higher clock speed in the Luma settings ? Under New 3DS settings. Those should allow you to get better performance at the cost of stability for a few specific 3DS games and a bit higher battery consumption. Those are used for New 3DS exclusive or "enhanced" games.
Otherwise, haven't tried those but perhaps this can be useful ? https://gbatemp.net/threads/pcsx-rearmed-optimal-settings.639274/unread