Search found 2572 matches

by Panu
Fri 2018-10-12 8:10
Forum: VS1010 Forum
Topic: Left, Right, and Gbuf and Mono output
Replies: 7
Views: 109

Re: Left, Right, and Gbuf and Mono output

Ok, got ya. No worries, just being kind of a perfectionist it helps to test the exact environment the customer has (although my criteria for perfection might be different than someone else's). But yes, there's at least one more monospeaker project (the other one is not piezo) so I'm working on a gen...
by Panu
Thu 2018-10-11 17:27
Forum: VS1010 Forum
Topic: Left, Right, and Gbuf and Mono output
Replies: 7
Views: 109

Re: Left, Right, and Gbuf and Mono output

Hi!

Ok, got it. Good datasheets. You're using an amplifier, which probably makes it a lot easier. Hmm, is there any chance you could send us a sample of that piezo element? I'm thinking about a software solution to focus on these kinds of mono speaker applications.

-Panu
by Panu
Thu 2018-10-11 14:12
Forum: VS1010 Forum
Topic: Click after power on
Replies: 1
Views: 32

Re: Click after power on

Hi! Hmm, maybe initializing the audio fully before switching on your amplifier might be a solution... The easiest way you could test it, perhaps, would be to play R:HELLO.MP3 before starting your application, this could be done from the config.txt file. Can you test if it makes any difference? Also,...
by Panu
Tue 2018-10-09 8:35
Forum: VS1010 Forum
Topic: Left, Right, and Gbuf and Mono output
Replies: 7
Views: 109

Re: Left, Right, and Gbuf and Mono output

Best way would be to design a highpass filter in software and put that in the audio path, maximize the output swing and drive the output inversely. I can help, although it'll take a little time. Do you have any idea about the frequency response (frequency range) and impedance of that piezo speaker? ...
by Panu
Sat 2018-10-06 1:16
Forum: VS1010 Forum
Topic: Left, Right, and Gbuf and Mono output
Replies: 7
Views: 109

Re: Left, Right, and Gbuf and Mono output

Hi! I looked at the source code and the audioPtr.rightVol = -audioPtr.leftVol; would work on the 16-bit stereo audio path, which is the most common audio path, but not mono or 32-bit path. It could be done globally by forking voaudio.c to make an audioOut SIMPLE_FILE interface with a forked AudioWri...
by Panu
Mon 2018-10-01 9:24
Forum: VS1010 Forum
Topic: VS1010D Virtual Memory, AAC, WMA and OGG Decoders
Replies: 7
Views: 180

Re: VS1010D Virtual Memory, AAC, WMA and OGG Decoders

Hmm. Interesting. I wonder what is different between my and your experience and if your procedure is different than my procedure. My procedure, after programming the flash and all is: - Turn on VS1010 - MP3 song starts to play, sound is heard - Press Enter on UART terminal program (TeraTerm) to get ...
by Panu
Fri 2018-09-28 14:20
Forum: VS1010 Forum
Topic: VS1010B Developer Board Quick Start
Replies: 5
Views: 1118

Re: VS1010B Developer Board Quick Start

Hi!

Well, for one thing, you can test WMA, AAC and OGG playback now and be the first outside our labs to do it! :lol:

I just released them at viewtopic.php?f=15&t=2318

-Panu
by Panu
Fri 2018-09-28 8:50
Forum: VSIDE
Topic: VS1005 MP3 Player with USB Host
Replies: 27
Views: 5261

Re: VS1005 MP3 Player with USB Host

Hi, do you mean, like, play audio backwards? Not realistically - first of all, would you really want that? And second of all, none of the music file formats (except PCM WAV, which could techinically be played in either direction) are designed to support such operations - there's no backwards linked ...
by Panu
Thu 2018-09-27 13:05
Forum: VS1010 Forum
Topic: VS1010D Virtual Memory, AAC, WMA and OGG Decoders
Replies: 7
Views: 180

VS1010D Virtual Memory, AAC, WMA and OGG Decoders

Dear Forum Members, Here is a binary software package that adds support for AAC, WMA and OGG decoding in the VS1010D. The VS1010D contains hardware and software support for virtual memory, which is implemented with a Translate Look-aside Buffer type of cache controller in the 4 kiloword instruction ...
by Panu
Mon 2018-09-24 9:46
Forum: VSIDE
Topic: VS1005 MP3 Player with USB Host
Replies: 27
Views: 5261

Re: VS1005 MP3 Player with USB Host

Hi! Should be. There's a CodecServices::goTo property that sets the current decode time in seconds. In MP3MODEL I can see that the message at least is interpreted. case UIMSG_U32_PLAY_TIME_SECONDS: if (auDec) { auDec->cs.goTo = value; } So you can set the current position by sending the UIMSG_U32_PL...