There appears to be very little information on the band, other than what DD found.
I haven't come across any as yet linking William with the band, not suggesting there isn't any.
You probably have the following brief information, it may help others who are looking.
William Hoyle McEwan, born, 1838/9, Limerick, Ireland, Died, Birkenhead, 1905.
Married, Margaret Galvin, Margaret died 1891, Birkenhead.
Remarried, Catherine Ann Evans, 1893, Toxteth Park.
1891, Hazel St, Birkenhead, Occupation, Professor of Music
1901, Borough Rd, Birkenhead, Musician.
1911, Pym St, His Widow and Children
In 1876, he must have been in India, a daughter, Charlotte was born there.
God help us,
Don't send Jesus,
This is no place for children.