User talk:2001:B07:AC9:3708:5DF8:6740:69B5:BBFD

October 2019
Please refrain from making unconstructive edits to Wikipedia, as you did at All-pass filter. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism may result in the loss of editing privileges. Thank you. SpinningSpark 16:39, 24 October 2019 (UTC)