@Ernest Bywater
In the past the tagged text { block } used to be displayed indented, aligned left in blue text. However, at some point that changed and it stopped being displayed in the same font as the general text in blue text and is now displayed in black text in a different font. I didn't like the way this displayed, so I changed how I set it out and stopped using the blockquote.
Many of us preferred the blockquote command to be indented, as it set the text off to denote notes, broadcasts or other things which alerted readers it wasn't the narrator speaking. However, I suspect that Ernest is the only one that insists on duplicating the old-style (for SOL) blue text. Otherwise, he sample coding is your best bet, since it centers and single spaces the song lyrics. I've also used that technique for quotes at the beginning of the chapter (in books, since they haven't appeared on SOL as yet).
Personally, I suspect that Lazeez is seeking to emulate how Amazon handles blockquote commands, reducing the indents to only a single character, as many ebooks are now copying that technique (including Calibre, among them, though you can turn that off manually). Frankly, if authors wanted to indent by a single character, we'd do it ourselves. So now, when I submit to Amazon, I create a Style to indent 5 character spaces on either side (ex: "5em;"), which varies depending on each display so it's properly proportional, rather than ignoring the indent entirely.