1. DRD Digital Audio Processor

2. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 2 Technology With precise echo phase and technique to reduce the discordance of speaker, DRD can improve audio product’s dynamic range substantially. Moreover, it makes speaker to create pure 、 natural 、 powerful and lively acoustics. You can experience True 3D sound easily. Makes it possible to reproduce super low bass lively. DRD is good at broken sound control, especially for strong bass on small speaker. Therefore, An amazing strong bass can be gotten via 2-CH speaker handily.

3. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 3 DRD can control broken sound coming from strong base sound of small speaker. DRD makes it possible to reproduce lively sound without distorting middle tone. DRD function can automatically detects the input signal -- music or speech ? DRD keep richness and clearness in small volume. DRD can control much enhanced sound without distorting original sound quality. DRD can compensate signal characteristics of speaker and cabinet at the same time. Key Feature

4. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 4 Key Function

5. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 5 LEF make focus of audio sound very clear. LEF make dynamic range of speaker as wide as possible. LEF make super low base and upper high treble very clear. Vocal becomes very lively. LEF make harmony in chorus becomes beautiful. LEF makes it possible to reproduce lively sound without distorting middle tone which is important for music. LEF – Liveliness Enhancement Filter

6. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 6 Most of base or treble enhancement will makes phase be shifted. But LEF dynamic range enhancement will keep phase at the same position. LEF Output Original Input Comparison LEF vs. Other Base Enhancement Comparison LEF vs. Other Treble Enhancement Other Filter LEF Output Other Filter Original Input

7. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 7 A_LEF keep richness and clearness in small volume. A_LEF let you enjoy rich sound even in small volume and will not disturb other people. A_LEF – Automatic Liveliness Enhancement Filter

8. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 8 Most of small speaker will produce broken sound in strong base sound. SDC can control broken sound and compensate dynamic range of small speaker. SDC – Small speaker Dynamic range Compensation

9. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 9 BTC only compensates to strong crazy base sound. Usually strongly enhanced low tone is exactly the problem for power amplifier system of audio set. BTC can control much enhanced sound without distorting original sound quality. Always keeps audio set in best condition. BTC – Base Tone Compensation

10. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 10 SMD function can automatically detects the input signal - music or speech ? SMD can make Speech clearer, make music richer. SMD – Speech Music Detection filter

11. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 11 Usually the un-perfected signal of audio set caused by the problem of mechanical design is hardly be compensated. FEQ can compensate signal characteristics of speaker and cabinet at the same time. FEQ can fine compensate EQ (f0, Q, Gain) by using PC tool on Real Time. FEQ – Fixed Equalizer

12. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 12 ACF will automatically control best coefficient by each volume level. And the best sound is kept in average use. ACF will optimizing frequency-gain characteristic correspond to sound level. ACF – Auto Coefficient Fixed

13. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 13 Package-28Pin MLF (6x6mm) IIS data bus, IIC control bus Power supply voltage : 3.3V 24bit fixed point, 70 MIPS compact DSP core Supply current : 1.2mA / 1Mips ( 40Mips / 48mA ) Sampling frequency : 32kHz/44.1kHz/48kHz Temperature range : -40ºC ~ +85ºC DRD_7Fs : Specifications

14. PAC ELECTRONICS CO., LTD. Tel:+886-2-29996599 http://www.pactw.com.tw e-mail:joy@pactw.com.tw 14 DRD-7Fs can be strongly help you to get solution for conflict problem in : Speech sound/ Music sound Livery sound/ Broken sound in large volume Poor sound/ Small volume Poor sound / Low cost speaker In generally