Reply 40 of 46, by radiance32
yyzkevin wrote on 2021-02-23, 21:39:
how is the sound when it plays through the computer speakers? I have brought the digital audio speaker pin out on my dev board to try it out but it is mono and i assume it sounds like crap more intended for modems? I had already been thinking about it for making fake modem sounds from my pcmcia esp8266 wifi model 🤣.
Midi (with that dream.fr chip and HardMPU Project) and OPL3 I am 100% confident I can do. For the other digital audio it is beyond me right now, but if I can move this forward a bit I know there are people here that can do this with their eyes closed just did not want to start it from the ground up. I have some IBM Mwave stuff I was interested to see what their "software/hardware" workaround is for lack of DMA in the early pcmcia versions.
The sound from the internal piezo speaker in the 200LX is horrible, and very quiet. (you literally have to put the 200lx on your ear like a mobile phone, when listening to digitized sound played through it)
If you want speakers, I think it's a much better idea to buy some modern micro speakers (like the ones they put in phones and tablets nowadays),
and put one or two (for stereo) in the LXsidecar housing. The 3d printed housing could contain some horizontal lines/holes on the front in front of the micro-speakers inside that allow the sound to come out,
and it would sound really good, like modern phone or tablet...
I would'nt bother with the internal piezo speaker of the 200lx,
also, I don't know if the PCMCIA interface in the 200lx has a connection to the internal piezo speaker,
and it would be a very dirty design if users will have to open up their 200lx'es and solder in some wires coming from the LXsidecar onto the piezo speaker inside the 200lx...
I think, if you want speakers, just buy a pair of those micro speakers that go into tablets and phones noawadays, and drive them with a tiny amplifier board in the LXsidecar,
you can get those tiny little amp boards very cheaply 😉
It's an interesting idea though 😀
EDIT: -> I think I could design the housing for the 200LX in such a way that it acts a little bit like a speaker box, and gives you a little bit more bass using the housing in the same way
as a speaker uses its housing to increase the bass response of the driver(s) in it. We could add a tiny port on the back so the speakers can push/pull sound through the housing, like many larger speakers have on the back (a port).
2nd EDIT -> Kevin -> Since we were talking about maybe putting in a headphone pre-amp, maybe we can find a small circuit board that has an amp for tablet/smartphone style speakers, an amplified headphone output, and a line out all at the same time... and have stereo speakers, a 3.5" headphone jack on the front and a 3.5" line out jack on the back of the LXsidecar...
3rd EDIT -> Kevin -> I've added an issue to explore this to our GitHub project, assigned to me... I'd like to look into this as it could solve a few of the ideas we already have and add a very useful feature: quality sound without headphones! 😀 )