It looks as if we're OK. Seydel say they don't own the output tabs. They give the example that the developer of a word processor does not own the output text.
Here's a copy-and-paste of the email.
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Hey Old Grantonian,
as far as I am concerned, the translated output from the SEYDEL Tab Tool is not owned by SEYDEL - we cannot control anyway if some possibly protected input is converted into tabs for another type of harmonica - we are just providing a tool for creating tabs for other than the common Solo-tuned or Richter tuned instruments...think of a word processing software: the text written with the aid of this program (or a copied text which is altered or translated) is not owned by the company providing the software.
So it 100% depends on the the user - private use should not be a problem at all - and like always publishing could become a problem. IMHO tabs are 'playing aids' only and different from sheet music where the full melody AND note lengths (rhythm) are defined to play back a melody exactly and therefore sheet music usually is protected by a copyright - tabs remain a grey-zone.
Musical regards,
Bertram
Dr. Bertram Becher
Product manager, player and consultant
bertram.becher@seydel1847.com
www.seydel1847.com
C. A. SEYDEL SÖHNE - NRW
Spiekersstr. 18
D-59269 Beckum
Germany
Tel.: 0049(0)2525 807947