VSDSP Forum

Re the Autogain : I tried all the values in AICTRL2 when setting AICTRL1=0, but none of the resulting MP3 files were acceptable. All of them had the base floor noise amplified to much higher levels.

This bothers me a little bit, because with autogain turned to sensible settings sound shouldn't be ...

dear,
i understand what you said,thanks.but,the important problem is that the "so"pin and the "xcs" had a same signal,when gave a variational signal to the "xcs"pin

1) You say that SO has a pull-up resistor, so when xCS is high, VS10xx doesn't drive SO and pull-up resistor drives SO high.
2) When ...

To continue on the same topic:

You might be interested in that I have prepared an application note on the different ways of how to connect VS1003 and other VLSI ICs to a microcontroller. If so, have a look at Connecting VS10xx SPI Buses , available at http://www.vlsi.fi/fileadmin/app_notes/vs10XXan ...

Hello!

And happy to hear you have been able to solve most of your problem! I still have one comment:

However, if we use AUTOGAIN by setting AICTRL1=0000, then the noise in the recorded data is unacceptable. So, for the present, we are setting AICTRL1=0x0400, AICTRL2=0000.

If you activate ...

... later this month we will publish an example code of how to record with VS1063 and how to read the recorded audio through SPI.

That "later this month" is now.

It gives me great pleasure to offer you generic microcontroller C example code for how to play back and record into MP3, Ogg, WAV PCM ...

dear all,
vs1063 as a slave,it connects with an arm MCU.when i use vs1063 to record and encode with mic or line,during recording and encoding,can i send the encoding data to the ARM MCU through spi? and, can i send the encoding data to other chip to decode at the same time?if you are patient,give ...

Could you upload an example recorded file showing the noise problem? It needs to be only a few seconds long so that the issue can be heard. Then we could try to guess the reason for it.

PS: You mention both VS1053 and VS1063. Which IC are you using?

Kind regards,
- Henrik

vito1989 wrote:can i make the avdd 3.3v?

This information can be found in the VS1003 Datasheet, Chapters 4.2 Recommended Operating Conditions, and 4.1 Absolute Maximum Ratings.

vito1989 wrote:what is the affection to vs1003?

It will break.

Hello Mahdi,

we don't recommend using a delay to synchronize your MP3 playback. Even if you try to maintain perfect timing it will sooner or later lead into synchronizing problems.

However, if you really want to save a pin, you may check the state of DREQ with two SCI operations instead of using a ...

It is normal that background white noise levels rise if you add amplification. However, there are of course limits to what is normal and what is not.

For us to be able to help you, please provide the following information:
1) Do you use line input or microphone input?
2) Is the noise white noise or ...