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Inspiron 15 - 5577 Laptop
Home Built Desktop PC with ASUS Z170, i7 6700K CPU, Windows 10 64 bit Pro. SSD drive. Sonar Platinum Recordng Software.
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Here is the download page for your driver:
The device is Soundmax made by Analog Devices
After you download it, it opens right up and says Soundmax. I have a 4550 as well and just did a reinstall. Sound works now.