Does this work with Linux (Ubuntu)?

This isn't the adapter I own, and I don't use Linux, but I'm pretty sure it will

How long is the USB cable?

The ICUSBAUDIO7D comes with a USB cable that's 1041mm (41") long. Matt, StarTech.com Support

how is the device powered?

Powered by usb And works Great i have been using it for months Because Realtech stoped working

Can i connect it to my tv? I have creative 7.1 speakers

So can you use it to get 7.1 sound from your TV? I'm afraid not. This device is for PCs and requires a software driver which your TV won't have. Nice idea though! You need a proper AV amplifier and a set of surround speakers to achieve what you are looking for - the Startech item is not a cheap way to achieve the same thing.

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StarTech.com 7.1 USB - External Sound Card for Laptop with SPDIF Digital Audio - Sound Card for PC - Silver (ICUSBAUDIO7D)

StarTech.com 7.1 USB - External Sound Card for Laptop with SPDIF Digital Audio - Sound Card for PC - Silver (ICUSBAUDIO7D)

Product ID: 53394632

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Details

Compatible devices
standard
Brand
StarTech
Hardware interface
USB
Audio output mode
Surround
Platform
Windows 10 11

🎧SPDIF digital audio support

🔊7.1 channel surround sound

🔌USB bus-powered plug & play

Description

🎶 Upgrade your audio game—because your ears deserve the best!

PRECISION AUDIO CONTROL - Integrated volume and mute buttons plus software-selectable outputs put you in command.
PLUG PLAY USB CONVENIENCE - No drivers needed—just connect and elevate your sound instantly on Windows 7/8.1/10.
IMMERSIVE 7 1 SURROUND SOUND - Transform your laptop audio with rich, multi-channel clarity for gaming, streaming, and calls.
TRUSTED RELIABILITY SUPPORT - Backed by a 2-year warranty and lifetime tech support to keep your sound flawless.
VERSATILE ANALOG DIGITAL OUTPUTS - Seamlessly switch between 3.5mm jacks and SPDIF optical for premium audio fidelity.

The StarTechcom 7.1 USB External Sound Card delivers high-fidelity 7.1 channel surround sound via a single USB port, supporting both analog and SPDIF digital audio outputs. Compatible with Windows 7 through 10, it offers plug-and-play installation, integrated volume controls, and a 1-meter USB cable. Designed to upgrade your laptop or desktop audio experience, it comes with a 2-year warranty and lifetime technical support.

Specifications

Hardware Platform	PC
Number of Audio Channels	7.1
Maximum Sample Rate	48 KHz
Signal-to-Noise Ratio	120 dB
Audio Output Mode	Surround
Platform	Windows 8.1, Windows XP, Windows Vista, Windows 8, Windows 11, Windows 10
Compatible Devices	Laptop, Desktop
Hardware Connectivity	USB
Item Dimensions L x W x H	3.9"L x 2.4"W x 1"H