Professional Audio Recording ICs for Embedded Systems
Voice recorder chips provide complete audio recording solutions from basic voice memo devices to professional meeting recorders. Our product line covers four categories: basic voice recorder ICs with ultra-low power for short-duration recording; multi-channel chips for simultaneous audio stream capture; OUPS/MP3/WAV with 96dB SNR; and Bluetooth recorder ICs combining wireless call recording with local storage.
All chips feature integrated ADC with 12-bit to 24-bit resolution, flexible storage options including TF card, USB drive, SPI Flash, SD NAND, and NAND Flash, as well as UART, SPI, and button control interfaces. Applications span recordable greeting cards, pet training devices, industrial monitoring, security systems, meeting recorders, and telecommunication recording. Customers can select optimal solutions balancing cost, audio quality, and capacity requirements.
High-fidelity MP3/WAV recording with 16/24-bit codec and 96dB SNR DAC. MIC/AUX recording with UART real-time streaming. Supports TF card, USB drive, and SPI Flash storage.
Feature:
• High-performance audio: 96dB SNR DAC, 90dB SNR ADC with equalizer adjustment
• MIC and AUX recording: Dual input sources for versatile recording scenarios
• Real-time UART streaming: Output audio data for server upload or speech recognition
• File management: Index recording, file name recording via UART interface
• Multiple storage options: SPI Flash, TF card, or USB drive for local storage
Chip Package:
SOP16, TSSOP24, TSSOP28, QFN32 (4x4mm)
Application:
Fire safety recording, elevator safety long-term recording, voice recorders, meeting office recording, fire broadcast systems, wireless walkie-talkie recording
Bluetooth recording with 16/24-bit codec and 96dB SNR DAC. Mobile phone voice and call recording via Bluetooth. TF card, USB drive, and SPI Flash storage support.
Feature:
• High-performance audio: 96dB SNR DAC, 90dB SNR ADC, up to 384kbps bit rate
• MIC/AUX recording: Direct mobile phone voice and call recording via Bluetooth
• Flexible storage: TF card, USB drive, or SPI Flash with file management
• File management: File index recording and file name recording functions
• Compact design: Multiple package options from SOP16 to QFN32 4x4mm
Chip Package:
SOP16, TSSOP24, QFN32 (4x4mm)
Application:
Fire safety recording, elevator safety long-term recording, voice recorders, meeting office recording, fire broadcast systems, wireless walkie-talkie recording
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Entry-level 12-bit ADC for toys and greeting cards. Standard 16-bit 79dB SNR for consumer products. High-fidelity 16-bit 90dB SNR for meeting recorders. Professional 24-bit 105dB SNR for premium audio applications.
Short duration (30-300s): Internal Flash, low cost, fixed capacity. Medium duration (8-133 minutes): External SPI Flash 8-128Mbit. Unlimited duration: TF card or USB drive up to 32GB storage.
Basic recording: Simple record/playback with button control. Noise reduction: Professional algorithms for clean audio. Multi-channel: Simultaneous stream capture and mixing. Bluetooth: Wireless call recording and smartphone connectivity.
Standalone: Local storage only, no external connection. UART streaming: Real-time audio output for cloud upload. Bluetooth: Wireless data transfer and remote control. USB mode: Direct PC connection for file management.
Professional voice capture with 96dB SNR and noise reduction. TF card storage for hours of meeting recordings.
Short-duration voice messages with button cell power. Ultra-low 5μA standby for multi-year battery life.
Record owner voice commands for playback. Compact design with built-in speaker amplifier for collars and feeders.
24/7 recording with industrial temperature range. Multi-channel support for multiple microphone inputs.
Bidirectional call capture for landline and mobile phones. Bluetooth hands-free recording with local storage.
Long-term audio logging for safety compliance. Real-time UART streaming for remote monitoring systems.
Quick voice note capture with simple button control. Integrated playback without external MCU required.
Audio data capture for machinery diagnostics. Wide temperature range (-40°C to +85°C) for harsh environments.
From 12-bit entry-level to 24-bit professional 105dB SNR. Single vendor for all quality requirements—eliminates multi-vendor complexity and ensures consistent API.
UART streaming outputs MP3/WAV data in real-time. Enables cloud storage integration and speech recognition without local buffering or SD card reading.
Hardware + software combined algorithms filter environmental noise. WT2000A3 flagship delivers studio-quality recordings even in noisy industrial environments.
-40°C to +85°C operating range for harsh environments. Proven reliability in automotive, industrial equipment, and outdoor security applications.
A: We offer four audio quality tiers: Entry-level 12-bit ADC for toys and greeting cards; Standard 16-bit ADC with 79dB SNR for pet products; High-fidelity 16-bit ADC with 90dB SNR for recording pens and meeting recorders; Professional 24-bit ADC with up to 105dB SNR paired with advanced noise reduction algorithms, comparable to professional recording equipment. The WT2000A3 flagship features 24-bit high-precision capture with hardware-software combined noise reduction, delivering crystal-clear recordings ideal for premium meeting recorders and professional voice capture applications.
A: Recording duration depends on chip model and storage solution. Internal storage: WT2000P supports up to 3 minutes, WT2003H4 offers 70 seconds, and WT2605A8 provides 300 seconds. External Flash: WT2605A4 with 128Mbit Flash can record 8000 seconds (approximately 133 minutes). TF card solution: WT2605A8 and WT2000A3 support TF cards or USB drives up to 32GB for virtually unlimited recording duration. Customers can start with small-capacity Flash and upgrade to larger Flash or TF cards later without changing the chip.
A: Three storage methods are available: Internal chip storage offers lowest cost but limited capacity; External Flash (4-128Mbit) uses SMD components with controllable cost; TF card/USB drive provides up to 32GB capacity with swappable media. Export methods include: WT2605A4 Flash can emulate USB mass storage for direct PC access without drivers; TF card/USB solutions allow direct plug-and-play reading; Recording upload chips stream audio data via UART serial port, supporting real-time transmission or stored playback for later upload.
A: The WT2000A3-42N flagship model features professional noise reduction combining hardware and software algorithms—the only chip in our recording lineup with professional-grade noise reduction. Its 24-bit high-precision capture paired with noise processing achieves up to 105dB SNR, effectively suppressing environmental noise and background hiss for dramatically improved recording clarity. Ideal for professional recording pens, high-end meeting recorders, and equipment monitoring applications demanding exceptional audio quality. This solution rivals professional recording equipment and is the top choice for premium audio capture.
A: Yes. The WT2605A4-24SS with R013 function code provides half-duplex intercom solution with single-chip encode/decode: MIC audio is captured, encoded, and output via UART; receiving end decodes UART data for DAC playback. Sampling rate and TF card storage are configurable, suitable for prison intercoms, bank teller systems, and building intercom applications. The WT2000A6-40N supports stereo dual-channel recording with AUXR and AUXL recording inputs, plus DACR and DACL playback outputs.
A: Two main formats are supported: MP3 and ADPCM. MP3 offers excellent compatibility and audio quality—WT2000P series supports 8-64kbps bit rates, while WT2605A and WT2000A series support 8-384kbps for music and high-fidelity recording. ADPCM provides low-cost simple encoding—WT2003H4 supports 8-24KHz sampling rates, ideal for voice applications. Higher bit rates deliver better audio quality but consume more storage. Customers can flexibly balance audio quality and storage capacity based on application requirements.
A: Voice recorder ICs typically support industrial-grade temperature range from -40°C to +85°C for reliable operation in harsh environments. This makes them suitable not only for consumer electronics like toys, greeting cards, and pet products, but also for industrial equipment monitoring, automotive chassis recording, and outdoor recording pens requiring operation in extreme temperatures. The wide temperature range ensures product reliability in hot vehicles, cold outdoor environments, and industrial sites.
A: Typical applications span seven industries: Recording pens and meeting recorders—choose WT2000A3 flagship; Toy and greeting card recording—choose WT2000P low-cost solution; Pet products and intercoms—choose WT2003H or WT2605A; Equipment monitoring—choose WT2605A for high-quality long recording; 4G alarm systems—choose WT2000L4 dedicated recording upload; Encrypted recording—choose WT2000A3 with R018 solution. Quick selection six-step method: First determine audio quality requirements, then recording duration needs, storage method preference, special function needs like upload/intercom/encryption, and finally match industry application with function codes R001-R104.
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