Man pages matching name dsp56k in section 4:

dsp56k.4.en	debian 10 / manpages
dsp56k.4.de	debian 10 / manpages-de
dsp56k.4.es	debian 10 / manpages-es
dsp56k.4.ja	debian 10 / manpages-ja
dsp56k.4.pt	debian 10 / manpages-pt
dsp56k.4.en	debian 11 / manpages
dsp56k.4.de	debian 11 / manpages-de
dsp56k.4.es	debian 11 / manpages-es
dsp56k.4.fr	debian 11 / manpages-fr
dsp56k.4.ja	debian 11 / manpages-ja
dsp56k.4.pt	debian 11 / manpages-pt
dsp56k.4.en	debian 12 / manpages
dsp56k.4.de	debian 12 / manpages-de
dsp56k.4.es	debian 12 / manpages-es
dsp56k.4.fr	debian 12 / manpages-fr
dsp56k.4.ja	debian 12 / manpages-ja
dsp56k.4.pt_BR	debian 12 / manpages-pt-br
dsp56k.4.ru	debian 12 / manpages-ru