The Association of Loudspeaker Manufacturers & Acoustics International presents How to Develop a Loudspeaker for iPhone 5 with Digital Audio Interface Dr. John Oh Pulsus Technologies www.almainternational.org Audio Interface of iPhone 5, iPad, New iPad, iPod Touch тАвтАп Lightning connector 30-pin -> 8 pin тАвтАп New connector is an active component with a chip inside тАвтАп Analog audio streaming is not supported anymore тАвтАп New interface iAP2 has announced, and older interface is now called iAP1 www.almainternational.org Implication тАвтАп Existing docking speakers are not compatible with iPhone 5 тАвтАп Converter should be able to convert USB audio to analog тАвтАп Existing analog docking solutions cannot be used in the new designs тАвтАп iAP1 based digital docking solutions can coexist with iAP2 for sometime. www.almainternational.org What is iAP2? тАвтАп Will replace iAP1 тАвтАп iTunes control тАвтАп USB high-speed audio up to 24bit 192 KHz (iAP1 < 16bit 48KHz) тАвтАп Analog audio removed тАвтАп Both USB host and device mode (iAP1 only support device mode тАУ iPhone is USB device) www.almainternational.org Start Developing Speakers for MFI тАвтАп Registered as a MFI developer тАвтАп Access MFI portal mfi.apple.com for resources тАвтАп mfi.avnet.com for compo, such as lightening connector, Apple authentication processor тАвтАп Choose mfi audio development system www.almainternational.org WhatтАЩs inside the new speakers? тАвтАп MCU with USB audio interface (with iAP Library) тАвтАп Apple authentication chip тАвтАп DSP for digital audio processing тАвтАп Audio CODEC тАвтАп Amplifier тАвтАп Alternative audio sources (Bluetooth, FM Tuner, DAB , etc.) www.almainternational.org PS8645, all-in-one SoC PS8645 = USB controller + MCU + audio DSP + PWM modulator + peripherals www.almainternational.org System Configuration General Docking Speaker www.almainternational.org тАвтАп тАвтАп тАвтАп тАвтАп тАвтАп тАвтАп тАвтАп тАвтАп 8051-based microprocessor with 64kB RAM Audio inputs - USB 2.0 full-speed host and device (selectively) - 3 x stereo AUX and 1 microphone - 2 x I2S - 1 x SPDIF (PCM only) Supports 16~24bit, 8-kHz~96kHz audio streaming Dual asynchronous sample rate converter with jitter attenuation for low distortion Fixed audio DSP with 24bit, 192kHz sound processing - 5-band/ch equalizer - Digital crossover - QXpanderтУЗ: virtual surround - Virtual bass - TuubilizerтУЗ : smoothly plays output over the dynamic range without clipping noise - Loudness volume 4-ch nDDC (Digital-to-Digital Converter) with HD PWM correction Peripherals - SPI, I2C, UART, JTAG, IR remote controller, real time clock controller, and 23 GPIOs Value-added functions: - Source level detector for lower power consumption - Device firmware update www.almainternational.org Development System for Rapid Prototyping PS2022 power amplifier I2S in 180 Speaker Optical USB AUX (PC) 1 8 0 Power supply 8-pin/30-pin connector Apple authentication coprocessor PS8645 www.almainternational.org Main Features тАвтАп iAP2 ready - Supports iAP1 and iAP2 - Supports USB host mode and USB device mode тАвтАп Better sound quality - Full digital audio streaming and amplification - Extensive audio DSP algorithms тАвтАп Low cost - PS8645, all-in-one SoC for digital audio docks тАвтАп Faster time-to-market with much less engineering - Development board for rapid prototyping - 2.1ch Module that can be immediately used to produce 2.1ch iAP2 docking speakers - Full SW library of iPod/iPhone/iPad dock functions and peripheral interfaces - Easy-to-use GUI SW development tool for real-time speaker tuning and input configuration www.almainternational.org iAP2 ready тАвтАп iAP2 MFi Device - USB device mode audio - HID (Human Interface Device) - Now Playing - 16bit 32kHz / 44.1kHz / 48kHz тАвтАп iAP2 MFi Host - HID - Now Playing - 24bit adaptive, 44.1kHz / 48kHz www.almainternational.org Technical Specification тАвтАп Audio Input - 8-pin/30-pin connector for iPod/iPhone/iPad : Supports both iAP1, iAP2 host, and iAP2 device - 1 stereo analog input (AUX) - S/PDIF optical input (PCM only) - I2S (optional) тАвтАп Speaker Output - 2-ch full-range or two-way / 2.1ch тАвтАп Audio algorithms: QXpanderтУЗ, Virtual bass, TuubilizerтУЗ, Digital crossover filter, 5-band EQ тАвтАп Display: 20 digits x 2rows character VFD тАвтАп User interfaces: - Button: Standby, sound mode, volume -, volume +, play/pause, intput - IR remote control : Standby, volume -/+, mute, play/pause, previous/next, menu, arrow up/ down, arrow left/right, enter, source input selection, PC to iPod link control, sound тАвтАп Supports Apple iPod authentication processor (2.0B / 2.0C) тАвтАп 8V - 17V single power operation www.almainternational.org 2.1ch module for immediate product launch тАвтАп A finished design that can be immediately adopted to mass production - No additional hardware development or programming is required тАвтАп Audio inputs - 8-pin/30-pin connector for iPod/iPhone/iPad : Supports both iAP1, iAP2 host, and iAP2 device - 1 stereo analog input (AUX) тАвтАп Speaker Output - 2.1-ch configuration: 10Wx2ch + 20Wx1ch (THD+N 1%) тАвтАп Audio algorithms: QXpanderтУЗ, Virtual bass, TuubilizerтУЗ, Digital crossover filter, 5-band EQ тАвтАп Display: 2 sets of LEDs for power mode and sound mode тАвтАп User interfaces - Button : Standby, sound mode, volume -, volume + - IR remote control : Standby, volume -/+, mute, play/pause, previous/next, menu, arrow up/down, enter, sound тАвтАп 15V/2.7A single power operation тАвтАп SNR: >90dB тАвтАп Small foot print: 120mm x 70mm (Main board) www.almainternational.org 2.1ch Reference Design PS2022 power amplifier 1 8 0 Speaker 1 8 0 PS2022 power amplifier 8-pin connector Apple 2.0c PS8645 AUX Power supply www.almainternational.org 2.1ch Reference Design www.almainternational.org Firmware development environment тАвтАп Provides a full library of iAP1 and iAP2 including digital audio streaming, general purpose peripheral interfaces, and authentication protocols тАвтАп SDK (Software Development Kit) with full library and sample source code of all the functions тАвтАп Users can customize the firmware firmware: - by adopting reference firmware released - through PulsusтАЩ SW development support program тАвтАп Industry standard C-compiler www.almainternational.org www.almainternational.org PDK Development Env. for DSP тАвтАп System configuration and real-time speaker tuning without DSP programming - Only through USB connection to PC/Macs, no specific equipment is required тАвтАп Quick adjustment of equalizer, crossover, and sound processing algorithms www.almainternational.org PDK www.almainternational.org PDK www.almainternational.org Dynamic Loudness www.almainternational.org Multi-input multi-function high-end docking speaker www.almainternational.org Summary тАвтАп New iPhone 5 pure digital Interface iAP2 has announced. тАвтАп Better sound quality through 24bit digital audio interface enables implementation of high quality audio systems. тАвтАп New development system and SoC architecture can significantly reduce development time and cost. www.almainternational.org