Louis Armstrong and his Hot Seven were the companion sessions of the Hot Five sides. The personel is the same as the first Hot Five records except that John Thomas of Erskine Tate's Vendome Orchestra takes over Kid Ory's place on trombone, Pete Briggs of the Carroll Dickenson Orchestra plays Tuba, and Baby Dodds plays drums. It is interesting to note that the addition of the tuba and drums to these sessions is probably less of an artistic decision than a technological one. In 1928 Okeh switched from an acoustic means of recording music to the new improved sounding electrical based systems. The acoustic recording process was often ruined by the vibration created by drums or bass, and recording engineers preferred not to have these instruments in a session or placed them so far from the recording horn, that they can rarely be heard well on the old acoustic recordings.