Design solutions that pursue the sound quality and experience you need
The USB audio interface has become a must-have feature on modern mixing consoles. With the Mountain Sight BP2668Dx, a single USB cable turns the console into a multichannel recording interface for PCs and phones — no external sound card required.
Recording from a console used to mean buying a separate multichannel audio interface, re-patching cables, and re-matching gain stages — extra cost, extra failure points, and inconsistent sound. As podcasting, online meetings, and mobile live streaming went mainstream, customers started expecting a console to capture and deliver audio, not just amplify it. For brand owners, integrating the USB interface into the main SoC instead of bolting on an external USB solution is the key to controlling cost while keeping audio quality consistent across channels.
The BP2668Dx comes in a QFN68 8×8 mm package with four 32-bit ADCs (SNR ≥ 105 dB), four DACs (SNR ≥ 112 dB), and a USB 2.0 HS OTG port. Master, group, and FX-return signals are sampled synchronously on-chip and packed into multichannel USB audio frames, so a DAW sees each console channel as an independent track for true multitrack recording. Because the path stays digital end to end, there is no second A/D–D/A conversion stage — no added noise floor, no inter-channel phase drift, and tighter sync than analog-out-plus-interface rigs.
Workflow one is live multitrack capture: connect the console to a PC over USB 2.0 HS OTG and every channel lands on its own DAW track for post-show mixing — no dedicated recorder needed. Workflow two is mobile live streaming and content creation: OTG lets the console feed a phone directly, so vocals, instruments, and backing tracks are mixed and EQ'd on the console and delivered as a finished signal to the streaming app. One hardware platform, two customer bases.
Real-time monitoring is latency-sensitive. The BP2668Dx provides a local hardware monitor path, so performers cue from the console's headphone output without routing through the computer's buffer — no round-trip delay, no echo on stream. On the USB side, the chip enumerates as a standard USB Audio class device, recognized driver-free by Windows, macOS, and mainstream Android. Firmware is configurable, so brands can tailor channel count, sample rates, and USB descriptors to differentiate product tiers on one chip platform.
Q: Does the BP2668Dx-based console need a driver for PC recording?
A: No. The design implements the standard USB Audio class protocol, so Windows, macOS, and mainstream Android recognize it as a multichannel audio device — plug in and record, with no driver installation.
Q: How many channels can be recorded simultaneously?
A: The BP2668Dx integrates four 32-bit ADCs, supporting four synchronized capture channels with multitrack output over USB. Additional channels can be added through digital audio interconnect between chips, subject to product definition.
Q: How do you avoid echo during phone live streaming?
A: The console's local DSP monitor path feeds the performer's headphones directly, bypassing the phone's return path entirely. Round-trip latency stays at the millisecond level, eliminating the delayed echo common in streaming setups.
Shenzhen Liwei Electronic Technology Co., Ltd. specializes in electronic design for audio headset and mixing console solutions, with over 10 years of experience in complete chip and PCBA solution design, serving 15+ well-known brands and 300+ customers. If you are developing a mixing console with a built-in USB audio interface, contact us for a custom audio solution based on the Mountain Sight BP2668Dx. [Request a Quote](https://www.liwei-elec.com/en/contact-us.html)
Shenzhen Liwei Electronic Technology Co., Ltd. specializes in electronic design for audio headset and mixing console solutions, with over 10 years of experience in complete chip and PCBA solution design, serving 15+ well-known brands and 300+ customers.
Keywords: mixer USB audio interface, Mountain Sight BP2668Dx, multitrack recording, USB 2.0 HS OTG, live streaming audio
