The miniDSP 2x4HD kit, a USB DAC + DSP in a low cost package
ART USBMIX6 Six Channel Mixer USB Audio Interface with DSP Effects - ProAudio.com
Site USB Device Server Pro by Microedge Instruments Inc.
Amazon.com: Poly + Polycom) DSP-500 Digitally-Enhanced USB Gaming/Multimedia Stereo Headset and Software : Electronics
Leicozic K5210 Dsp Professional Digital Signal Processor Touchable Screen With Software Control/ Wifi / Usb Effect Processador - Stage Audio - AliExpress
USB Audio interfaces
USB JTAG for DSP TMS320 - PGM-09049 - SparkFun Electronics
Universal Audio UAD-2 Satellite USB OCTO Core Desktop USBSATO-C
PreSonus Revelator io24 USB-C Audio Interface With Onboard DSP | Full Compass Systems
UA Apollo Solo USB Interface w/ SOLO DSP (only Win)
Universal Audio Apollo Solo | USB-C Audio Interface with UAD DSP | PC Version | Open Box | Pro Audio LA
Apogee Boom | 2 In x 2 Out USB-C Entry-Level Audio Interface with DSP | Reverb
Universal Audio Apollo Twin USB DUO Heritage Edition 10x6 USB Audio Interface with UAD DSP | Sweetwater
Dayton Audio DSP-BT4.0 Bluetooth Data and Streaming USB Interface for DSP -408
Amazon.com: Dayton Audio DSP-BT4.0 Bluetooth Data and Streaming USB Interface for DSP-408 : Electronics
Amazon.com: PreSonus Studio 1810c USB-C Audio Interface 18-in/8-out with 4 Xmax Preamps, ADAT I/O, S/PDIF I/O, MIDI I/O, DSP Monitor Mixer with Gravity Magnet Phone Holder and Pair EMB XLR Cables Bundle :
Plantronics Audio DSP Adapter
3.5mm TRS Male to USB Type C DSP Headphone Jack Audio Adapter Cable for Lark M1/150 , - Walmart.com
Amazon.com: Dayton Audio DSP-BT4.0 Bluetooth Data and Streaming USB Interface for DSP-408 : Electronics