The boundary for transformation is established in several areas of media.
Recorded samples from the line out of a synthesizer are owned by the author of the recording, even if they're factory presets. Likewise, bitmap conversions of a vector font are the property of the game developers who made them.
In contrast, sample data copied from the ROM of a synthesizer is still under copyright, and original vector font files are owned by their authors.
Actualy, generally in the US, bitmap fponts are not copyrightable, nor are any pure image representations of the glyphs in a font. Truetype fpnts generally are copyrightable because they are small programs that generate the desired glyphs, and it's the program itself that is protected.
Recorded samples from the line out of a synthesizer are owned by the author of the recording, even if they're factory presets. Likewise, bitmap conversions of a vector font are the property of the game developers who made them.
In contrast, sample data copied from the ROM of a synthesizer is still under copyright, and original vector font files are owned by their authors.