Search found 25 matches

by joe6486
Mon 2019-02-25 21:36
Forum: DSP and Audio Software
Topic: MP3 on VS1000 module? Patents have all expired.
Replies: 3
Views: 1145

Re: MP3 on VS1000 module? Patents have all expired.

Thanks. I see a VS1103 module but it doesn't seem to support MP3, per the datasheet or website. Is there software available for this purpose?

I doubt anyone would have a problem with losing OGG support in favor of MP3. Like it or not, MP3 is the industry standard it seems.
by joe6486
Tue 2019-01-29 23:50
Forum: DSP and Audio Software
Topic: MP3 on VS1000 module? Patents have all expired.
Replies: 3
Views: 1145

MP3 on VS1000 module? Patents have all expired.

Now that all of the MP3 patents have expired, there really should be no barrier to including MP3 support on the popular VS1000 module (and chips for that matter). There is no longer any need for licensing or surcharge. While OGG is arguably a better format, MP3 is undisputedly the "standard" and sho...
by joe6486
Mon 2018-10-08 15:06
Forum: DSP and Audio Software
Topic: Audacity OGG encoder not working with VS1000
Replies: 6
Views: 1029

Re: Audacity OGG encoder not working with VS1000

Thanks! I can tell them to limit OGG bitrate to, say, 320kbps or so. What about WAV file formats, are there any definitive specifications I can offer to users? We'll change the clock if we have to but we haven't looked at our custom code in a while. I think we're ok just instructing customers accord...
by joe6486
Fri 2018-10-05 19:44
Forum: DSP and Audio Software
Topic: Audacity OGG encoder not working with VS1000
Replies: 6
Views: 1029

Re: Audacity OGG encoder not working with VS1000

Looks like there is a nominal setting for bitrate in audacity, but I'm not sure what the VS1000 can support:

https://wiki.audacityteam.org/wiki/OGG
by joe6486
Fri 2018-10-05 19:28
Forum: DSP and Audio Software
Topic: Audacity OGG encoder not working with VS1000
Replies: 6
Views: 1029

Re: Audacity OGG encoder not working with VS1000

Thanks. I'll email a link. The bitrate is about 500kbps, so maybe that's too high?

Are there any definitive specifications for what type of .ogg file is acceptable? (WAV also, while we're at it.) This is all for microSD playing.
by joe6486
Tue 2018-10-02 21:34
Forum: DSP and Audio Software
Topic: Audacity OGG encoder not working with VS1000
Replies: 6
Views: 1029

Audacity OGG encoder not working with VS1000

We've been trying to help out a customer with a problem, and it appears that the VS1000 module does not properly decode ogg files that were encoded with audacity. The files play perfectly on a computer, but there are all kinds of awful artifacts when playing the same files on the VS1000. We can use ...
by joe6486
Wed 2015-01-28 21:05
Forum: Stand-Alone Applications
Topic: Guaranteed "off" voltage for VS1000
Replies: 5
Views: 1236

Re: Guaranteed "off" voltage for VS1000

Thanks, I see the new schematic, and I expect this will cure the issue without rework needed.
by joe6486
Fri 2015-01-23 22:02
Forum: Stand-Alone Applications
Topic: Guaranteed "off" voltage for VS1000
Replies: 5
Views: 1236

Re: Guaranteed "off" voltage for VS1000

Looks like sending a 3.3V pulse to POWBTN directly works. Thankfully there's a via on your PCB (though still a bit of a bodge).

I'll have to order some 3.6-5.5V models to experiment with; maybe they won't need this fix. Do you have schematics/changes for this variant?
by joe6486
Fri 2015-01-23 17:48
Forum: Stand-Alone Applications
Topic: Guaranteed "off" voltage for VS1000
Replies: 5
Views: 1236

Re: Guaranteed "off" voltage for VS1000

I see, so this is more likely a problem with the startup pulse not being adequate on PB, rather than the module starting in a poor state from a low VCC. And that's why a reset wouldn't fix anything, since the system never started in the first place with an adequate pulse on PB. Do I understand corre...
by joe6486
Thu 2015-01-22 17:15
Forum: Stand-Alone Applications
Topic: Guaranteed "off" voltage for VS1000
Replies: 5
Views: 1236

Guaranteed "off" voltage for VS1000

Due to other design factors, I sometimes 'leak' about 1V on the VCC line before powerup which seems to cause the player to lock up without starting when the full 5V is applied. Bringing the reset pin low does NOT cure this. Reducing this voltage to 0.9V seems to remedy, but I want to be sure this is...