I’ll explain and show why you should use a softer ball when practicing on the tennis wall.
Here is the list of equipment I used when recording: (affiliate links)
Wilson Foam Tennis Ball: https://amzn.to/4gK6rm8
Head Speed MP Legend: https://amzn.to/3AYiaOj
Head Hawk Touch: https://amzn.to/4gav6zh
Tripod for phone: https://amzn.to/3XcfiFE
Microphone Rode Me: https://amzn.to/4gw8xWO
Video Camera Sony ZV e10II: https://amzn.to/4dSi3C7