I got this fixed. First I set up the PS3 controller "manually" using this post as a guide:

https://www.reddit.com/r/RetroPie/comments/3ye3f0/cant_manage_to_configure_dreamcast_controls/

Then, I did the first two things on this post (1 - disabled emulationstation's automatic configuration of reicast and 2 - modified reicast's config so it attempts to "read" the proper joysticks from /dev/input)

https://retropie.org.uk/forum/topic/2869/reicast-not-detecting-xbox-360-controller-partially-solved

I noticed that when the keyboard was hooked up it was controller id 0, and the PS3 was Id1. With no keyboard the PS3 controller was Id0 and worked. So I told it to look for id1. But then it stopped configuring the controller in reicast, so I had to do it manually.

Now the PS3 controller works - would be nice if I didn't have to tell it which controller in case the numbers change, but it works and that's what really matters.

There is this project that is building the gamelist and art based on the output of my scraper and other sources https://github.com/recalbox/recalbox-gamelists It requires that things are named like no-intro set.

Another option is to run my scraper from another system and just copy over the gamelist and images. I make versions available for almost everything (I don't have FreeBSD but now that I'm running that I may add it)

You can download here:
https://github.com/sselph/scraper/releases

And the basic instructions are unzip the zip and place the scraper executable in the rom folder and from a command line change directory to the rom folder and run ./scraper or scraper.exe on windows. That will create a gamelist.xml and images folder that you can copy over.

@ruxton_bruce I'm glad you have it sorted out. I've opened an issue to track adding a check for bin files named the same as the cue. I imagine that it is common enough that the emulator handles it. https://github.com/sselph/scraper/issues/100

@vretro can mount /tmp on tmpfs. If we did that by default there would be out of memory issues

ok. there is no cheaper way to get a few more USB devices onto the zero? I do not know why the first controller connected to the hub works, but the others don't. have I misconfigured retropie?!

@SA_Drone an option has been added the scraper module to scrape your metadata into rom folders as well

@challenger2010 Yeah and even on Dragons Lair 2 the overlays go away after you get past the first level. After that you only get the visual queues just like in DL1 and Space Ace.

@DM24 Are you running Win32DiskImager as Admin?

@caver01 Actually, What I needed was very simple. I had recently soft modded my 3ds but couldn't find anywhere on how to edit specific roms. I wanted to view vertical roms horizontally.

However in the future I may look into making a mame system with a RP3. Thanks for the help I'm trying this out today

@senkun thanks for the reply yes I have done this and the buttons work fine in emulationstation so then I ssh over some snes Roms started playing one and it keeps bring up the Retroach menu also the screen goes black for a few seconds somtimes

@dkloss28 said in audio question:

@kcc406 my pi3 will be here on thursday, taking amazon way to long to ship it out

got to get that prime :)

I installed Retropie 4.0 rc1 and DS4 goes a little better, it reacts fasters, but sometimes it continues pressing random buttons, so i decided to just use DS3 controllers, you have to pair it with an usb cable but it goes perfect, maybe the best controller for rasp. I think DS4 drivers have to be improved, just be patience.

@meleu well, the original controller i use, is a custom coded teensy in a gameboy project im making
I'm trying to set everything up, before i stick my pi zero in the case. the code i use for the gameboy custom controller, uses the d-pad as hat switch, and for some odd reason, the non lr emulators, wont detect my d-pad presses, but they will detect all my other buttons (a,b,select start). so, i decided to put that on hold, and look into the lr emulators, and started with gpsp... and thats where i came across the issue, with swapping controllers. initially, i spent days and hours, trying to get mame4all (non lr) to detect my dpad/hat switch and it wouldnt, and that mame4all runs games the fastest/smoothest for me.

@BuZz will do.

I would have 8 buttons (ABXYLR Start Select) plus joystick for each player.

I only use libretro cores so all extra functions like quit or menu are done by hotkeys as described at:

https://github.com/RetroPie/RetroPie-Setup/wiki/RetroArch-Configuration#default-joypad-hotkeys

@rbaker Thanks. I haven't got my Pi yet but if v4 is on the way, I might grab v3 before it gets removed.