Hi!
Back from the holidays with a new version 0.10 of RecPlayExample, the Voice Recorder / Voice/MP3 player for the VS1010 Developer Board. There are several new features and changes to this version:
- The Voice Recorder has now an option to record at 16 kHz instead of 8 kHz. 16 kHz is the new default.
- There is a new Project, RecPlay.dlx, which acts as a Master Control Program for the other Solutions. A looping config.txt is no longer required.
- All the VSIDE Solutions are collected to one big Solution with several Projects.
- Some cleanup of the code.
The relevant part of the README.TXT provided in the package is quoted below:
Code: Select all
RecPlay 0.10
------------
for VS1010
2019-07-26 VLSI Solution
INTRODUCTION
RecPlay is a collection of projects that can play back MP3 music files and
WAV voice files, and record WAV voice files at 8 kHz IMA ADPCM WAV files
at 32 kbit/s. The example is designed to run on the VS1010 Developer Board.
To use, copy all six .dlx files in this package to your S:SYS/ folder. If
you want the project to start automatically, create a S:CONFIG.TXT file with
the following line:
RecPlay
Alternatively, you can start the project by booting the VS1010 Developer
Board, then pressing Enter to get to the command mode, then giving the
following command to the prompt:
VS1010>RecPlay
When you start RecPlay, you will be greeted with the following message:
*** RecPlay v0.10, welcome! ***
followed by more messages.
HOW TO USE
The software has four modes. Button B0 switches between modes 0-3. Mode 4 is
activated by connecting the board to a PC through USB.
1) Voice playback mode (.WAV files)
2) MP3 playback mode (.MP3 files)
3) Voice recording mode (.WAV files)
4) Computer file copy USB mode
1) Voice playback mode, indicated by Green Led LED1:
When in pause mode, LED1 is lit, when playing LED1 blinks.
Control buttons are:
- B0 short: Next mode
- B1 short: Pause on/off
- B2 short: Previous file
- B2 long: Volume up
- B3 short: Next file
- B3 long: Volume down
If the board is connected to a PC through UART, USB mode is activated.
2) MP3 playback mode, indicated by Green Led LED1:
When in pause mode, LED1 is lit, when playing LED1 blinks.
Control buttons are the same as in Voice playback mode.
If the board is connected to a PC through UART, USB mode is activated.
3) Voice recording mode, indicated by Green and Red Leds LED1 & LED3.
Voice recorder starts in pause / monitoring mode.
Control buttons are:
- B0 short: Next mode
- B1 short: Record / Stop
To exit the RecPlay software, push Esc at any time.
SELECTING VOICE RECORDING SAMPLE RATE AND BIT RATE
This version records by default at 16 kHz, which creates ADPCM files of
approximately 65 kbit/s. Alternatively, the software can record at 8 kHz,
halving the file sizes. To select between these two options, you may
change the definition of the symbol HIGH_SAMPLE_RATE in the RecAdpcm
project file main.c. The ramifications are as follows:
If HIGH_SAMPLE_RATE is set:
- Use 16 kHz recording sample rate.
- Recording bit-rate is approximately 64.9 kbit/s.
- Example file: docs/Recording_16kHz.wav.
If HIGH_SAMPLE_RATE is not set:
- Use 8 kHz recording sample rate.
- Recording bit-rate is approximately 32.4 kbit/s.
- Example file: docs/Recording_08kHz.wav.
The example files are actual RecPlay recordings made in normal office
conditions using the on-board MEMS microphone provided on the VS1010
Developer Board. No post-processing or other tricks have been applied.
PROJECTS IN THE RECPLAY SOLUTION
There are several projects in this solution, all needed to get RecPlay
working properly. They are listed below:
- RecPlay.dlx: Wrapper calling TreePlayer2 and RecAdpcm
- TreePlayer2.dlx: A player program for voice .WAV and MP3 playback
- RecAdpcm.dlx: An IMA ADPCM .WAV recorder program
- ums.dlx: Usb Mass Storage device driver for when connected to PC
- USBPROBE.dlx: Probe what is connected to USB
- USBHDD.dlx: USB Host driver for a situation where a USB stick is inserted
To get an idea of the bit-rates, if using a small 8 GB SD card, and recording at 16 kHz, the total voice recording time is over 11 days. At 8 kHz, total voice recording time is over 22 days.
As usual, I hope this software package is useful to you!
Kind regards,
- Henrik
Good signatures never die. They just fade away.
