Audio tax write-off

Yes I do especially now as I am editing and ding audio dubs at the home as office is a no go

For the 21 years I had my business I did not write off the "office in the home", though it was 100% legit, as it would have figured into the "basis" when calculating the capital gains on my home and its equity.

Having said that, I did write off the purchases I made for business purposes, like computers, monitors, printers and supplies.  As well I wrote off a portion of my internet and cell phone bills.

The one thing I didn't do was to have a "company car", as my CPA advised that it was a "red flag" if I claimed over 25% as a "consultant", so instead I logged my business mileage and wrote the actual miles at the rates for those years according to the IRS standards.

It sounds like the items you are asking about for your taxes are "legit".  But I'd say it's best to bounce that off your tax advisor.

Another important consideration:
The home office tax write-off is not available to employees of companies.  If you're an independent contractor, gig worker or the business owner, you're good to go.
If you're just an "employee" of someone else who regularly works from home, trump's 2018 tax cut took that deduction away from you.  At least through 2025.

Writing off equipment as a business expense can involve more than the IRS.  Where I live, the county taxes business assets.  As such, the "good deal" of writing something off can cost a lot of money in the long run through additional local taxes unless the equipment is regularly upgraded and replaced.  That's why many of the local machine shops lease the majority of their equipment - it's always an expense and deductible, the equipment is repaired by the lease company, and the shop upgrades the equipment at the end of the lease.

Just ask Trump. He’s an expert at squeezing deductions.