VSDSP Forum

Hello, I'm using vs1053 decoder with an amplifier. The problem is that the maximum amplitude that my amplifier can apply is 100mV and the Peak to Peak value for vs1053 is 1.83 V. Is there any way to lover the amplitude using hardware technique not the software? I understand that we simple can reduce...

Thank for reply,

I got it. The only question is why i don't see this noise on a 0db volume. Only when we lower the volume this noise appear.

Hi, My chip is playing mp3 fine at full volume. I decided to lower the volume. I have generated the sine signal and converted it to mp3. I connected oscilloscope to the output of vs1053 chip (i'm not using GBUF but large filtering capacitors). I see a nice sine stable signal. About 1v amplitured. I ...

Thanks for help,

Thanks, I have looked through the links. I can get the fill state but if i do this in the interrupt on the DREQ i will get a value close to 32 bytes or maybe 10-20 % more. My CPU is very powerful. So in that case the DREQ interrupts will trigger too often. That is not time efficient. I see two solut...

Hello, I'm using VS1053 decoder. In my design there is a ARM which controls vs1053. I want to use DREQ as an interrupt source but i think this will not be time effective. According to datasheet when DREQ goes high we can write at least 32 bytes of data. This is too little to write for one interrupt....

Hello,

I'm designing board with vs1053 decoder. Don't know what regulator to use.
I would like to ask what linear regulators do you use on your evaluation DSP board:

http://www.vlsi.fi/en/support/evaluatio ... board.html

Hallo, Thanks for reply I don't know.. your methods seems OK if you have good capacitors at the 5V power. But have you taken a look at your ground layout? Maybe the problems come from the ground, is it strong enough? A car is a challenging environment for a good ground design. I'm using two pcb boar...

Hallo, I'm using VS1053b as an mp3 player in a car. I'm converting 12V to 5V using step down converter and then converting 5V to 3.3 2.5 1.8 using LDO. I found that output has a noise about 10mV. Probably using a step down converter is not a good idea here? Am i correct? What LDO would you recommend...

Hallo, I'm using vs1053b decoder. I'm currently implementing playback cancel in my software. From datasheet i understood that after SM_CANCEL cleared i need to read endFillByte and send 2052 times. Do I need to read endFillByte each time i cancel the playback? Or it is sufficient to read it once at ...