MSM9811GA View Datasheet(PDF) - Oki Electric Industry

Part Name

Description

Manufacturer

MSM9811GA

4-Channel Mixing OKI ADPCM Type Voice Synthesis LSI

Oki Electric Industry 

OKI Semiconductor

FEDL9811FULL-04

MSM9811

Playback Time and Memory Capacity

The playback time is determined by external memory capacity, sampling frequency, and voice synthesis algorithm.

The relationship is described below.

Playback time =

1.024 × (Memory capacity – 16) (Kbits) (Seconds)

Sampling frequency (kHz) × bit length

(The bit length is 4 bits for ADPCM and ADPCM2 and 8 bits for PCM.)

When the sampling frequency is 16 kHz and the voice synthesis algorithm is 4-bit ADPCM and an 8-Mbit ROM is

used, the playback time is calculated as shown below.

Playback time = 1.024 × (8192 – 16) (Kbits) ≅ 131 (Seconds)

16 (kHz ) × 4 (bit)

In the above equation, the playback time when the phrase control table function is not used is shown.

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