Well…I’ll only answer the first question cause that’s the one I can fully see, Beckett hipkiss' voice sounded kinda like… there was something in his vocal cords
Jaxon_Mercey also does a very great job voicing ryder, although it was very higher pitched and he was around 10 years old at the time voicing ryder in half season 3, all of seasons 4-5 early season 6 although his voice change and becames deep.