Speech & Audio

Feature 1. No need for studio recording

Using Epson speech & audio LSIs for your products featuring voice guidance functions means there's no need to arrange recording studios or hire professional voice performers. This allows you to significantly reduce the product development costs and time to market. The TTS tool available from Epson makes it easy to create or modify your speech phrases. Japanese, English, and Korean language versions are now available.

Feature 2. Excellent sound quality for messages up to 4 times longer

bitrate EPSON
(16kHz)
ADPCM
(16kHz)
ADPCM
(8kHz)
1MB approx 8min approx 2min approx 4min
2MB approx 16min approx 4min approx 8min
4MB approx 33min approx 8min approx 16min
8MB approx 1hour 6min approx 16min approx 33min
16MB approx 2hour 13min approx 33min approx 1hour 6min

Epson's highly efficient encoding format allows for longer phrases with excellent sound quality. The integrated high-quality 16-bit DAC produces a "silky voice" that can be coupled with high quality sound effects.

Feature 3. Easy to integrate

Epson's voice guidance LSIs use a message protocol based on asynchronous serial interface. This means they are easily integrated into a wide range of host devices and microcontrollers, reducing development time and costs, and helping achieve faster time to market.

Feature 4. Easy Development by S1V3G340 + EPSON Speech Tool

The combination of the All in One PC tool "Silky Voice" generator, and use of external SPI-Flash with the S1V3G340 makes it easy to create, write and evaluate voice data. The created voice ROM data can be written to SPI-Flash from a Host CPU via the S1V3G340. The use of high-quality audio and a high-compression format also enables the loading of large voice data capacity.

"Silky Voice" Creation tool Voice Sample

Here are some sample voices for Epson's audio and speech LSIs created by our PC-based TTS tool. Click the following links to experience studio-quality voices with high quality sound effects.

Voice guidance LSI lineup

Series name S1V3G340 S1V3034x S1V3S344 S1V30080
Status MP MP MP MP
Download S1V3G340 Data Sheet
199KB
S1V3034x Data Sheet
98KB
S1V3S344 Data Sheet
196KB
S1V30080 Data Sheet
258KB
Power supply 5.5v-2.2 single
Clock 32.768kHz or 12.288MHz 8.192MHz(fs:8kHz)
16.384MHz(fs:16kHz)
Host interface SPI/UART/I2C
(Command control)
SPI/I2C
(Command Control)
standalone mode
Sampling frequency 16kHz 4,8,12,16kHz
Sound Decode Format Epson Original Format
Bit rate 16/24/32/40kbps 8bit/10bit mode
Melody Synthesizer - Supports 5ch,5 Octaves
Sound Phrase Combination Function No limitaion on combination
Setting of DelayBetween Phrases 0 ms, 20-2047 ms (1 ms step) 0ms-1000ms
(10 ms step)
Sound Data Streaming Regeneraiotion Supported by the command control through the host interface Melody data streaming supported
Integrated ROM Size (Time) - S1V30341:1 min.*1
S1V30343:3 min.*1
S1V30345:5 min.*1
Approx.4min*1 Approx.30 sec
(fs.8kHz)
Approx.15 sec
(fs.16kHz)
DAC Highly accurate 16-bit DAC 10-bit DAC
Package QFP13-52pin (10mm □, 0.65mm pitch) QFP13-52pin (10mm □, 0.65mm pitch)
QFP12-48(7mm □,0.5 pitch)
QFP13-52pin
(10mm□,0.65pitch)
QFP13-52
(10mm□,0.65pitch)
QFP12-48
(7mm□,0.5pitch)
Languages supported by TTS tool Languages supported by TTS tool: Japanese, English, Korean
(No language restricitons when used for studio recording)
Evaluation Board Supported
Sample Code(For the Host) Supported

*1: Estimate when used at 16 kbps

Voice guidance LSI:S1V3G340, S1V3V344, S1V3S344 Evaluation Board

S1V3G340 Evaluation Board
S1V30344.S1V3S344 Evaluation Board

Tool for MAC address check ZIP