VSDSP Forum

Hello! To elaborate on what Panu said: if your card #2 is intended to read data through I2S input, then process the audio in any way that doesn't alter the sample rate, then output the end result through I2S, the process goes roughly as follows: 1) Make the connections as shown in the image below. T...

Hello! When developing code that has to work in real time, oftern the question arises: how much do I still have free CPU time? Am I close to the limits of the CPU, or do I still have a lot of juice left. A new driver for VSOS 3.57 or higher, CpuFree, solves that issue. It can report CPU usage at giv...

Hello! The APE decoder has been updated to v1.01. The new version contains a bug fix that fixes occasional noise bursts and lock-ups, as well as speed optimization, which makes the worst case .APE files decode with approximately 3 MIPS less clock cycles than before. Instructions for use are the same...

Hello! I present with the greatest pleasure the newest decoder coming from VLSI's vaults for VS1005 / VSOS: Monkey's Audio . VS1005 is now capable of playing .APE files in real time. Of the five different .APE profiles, VS1005 supports Fast, Normal, and High compression levels up to 48 kHz stereo. F...

Hello! The low amount of free memory is constantly causing audio overflows on recording, usually around 6500 samples lost per second. Only when the device is recording from optical input (S/PDIF) and no audio is playing it doesn't lose samples. What is your clock speed? If at e.g. the default 60 MHz...

Hi! After typing this edit, I figured it out: I have to copy-paste from your post and it works with LF (enter or CTRL+M still returns to beginning of line). Apparently the tildes inputted by copy-pasting and typing are different. A tilde should always be a tilde, and if that was not correct, it woul...

Hello! Update: I accidentally bricked the internal flash of the dev board by calling AuInput with a wrong -p pointer. I got it restored, but now I'm running out of memory on BOOT!!! What's going on? Was some sort memory map file corrupted? In addition to what Panu wrote, I suggest that for the futur...

Hello! Adverts is a new program for VS1005 / VSOS that is intended for a system that plays advertisements over background music. Both the background music and the ads can be conveniently put on an SD card. Adverts can play these files in a timed fashion, either in alphabetical order or through shuff...

Hello! We have just realized that it is actually unnecessary to write any input changing code for the VLSI chip if we can just boot it in UART console mode and control it from the front panel using that. A couple of problems arise with this approach: #1: Is it possible to change the recording volume...

Oh, please note that the new version of AmpBConf of the previous message is not yet part of the VSOS 3.57 Root Images and Libraries package because that was released already a week ago. So, if you want the new functionality, download AmpBConf.dl3 from here until the next VSOS release's Root Images a...