1 Systems Design Review Group P14345 Team Lead: William Sender Jeffrey Auclair Bryan Beatrez Michael Ferry

2 Agenda 1. Background Problem Statement Deliverables Customer/Engineering Requirements Benchmarking 2. System Analysis Concept & Architecture Development Functional/Engineering Analysis Risk Assessment Test Plan

3 Section One Background

4 Problem Statement - Audio amplitude control for motion picture shows. -Maintain the quality and dynamics of the sound. -Improve flexibility while maintaining audio quality. -Maintain usability that of previous devices.

5 Deliverables A working prototype All design files (ex/ source code and libraries) Documentation with board schematics and board artwork Test results verifying proper functionality

6 Customer Needs

7 Engineering Requirements

8 Traceability Matrix

9 Benchmarking / Feasibility Processors: -MSP430x6xx series: 25MHz, 25 MIPS, 567 instructions per 44.1KHz sampling. -PIC24F16KL402 FAMILY: 32MHz, 16 MIPS, 363 instructions per 44.1KHz sampling. -Ashly Protea™ 4.8SP: twin 120MHz Motorola DSP56362 high performance DSP processors, 100/120 MIPS, 2268 instructions per sample per 44.1KHz sampling. (Additional Features beyond compression) Standard Attack and Release times: -Ashly CLX-52: Attack 200μS – 20ms, Release 100ms – 3 Seconds. -DBX 1066: Attack dB/mSec, Release dB/Sec. -There is roughly 23μs between 44.1KHz.

10 Benchmarking / Feasibility Microcontroller Requirements AD Converter (not mandatory) DA Converter (If not then two PWM outputs) LCD/LED Support Hardware Interrupts (2-3) Timers (3) I2C buss Fast, at least 350 instructions per sample at 44.1kHz GPIO (6-8)

11 Section Two System Analysis

12 Functional Analysis

13 Concept Development

14 Concept Development

15 Engineering Analysis

16 Architecture

17 Risk Assessment Bryan - Digital system risks (display, microcontroller) Jeffrey - Auto Mode and Noise William - System and Power (Project management, I/O issues) Michael - Electrical Failures (short circuit, shock, fire)

18 Test Plan Quantitative o software tests signal quality o ex/ Audacity o signal quality traits, threshold, attack, ratio, etc. Qualitative o humans test audio quality o group of audio enthusiasts and ordinary people o they will rate audio quality on 1-10 scale o average should be above certain number

19 Schedule

20 Questions