Sure there are: [s͎˩˧˥˧˨˦˥˧˥˧˨˦] and so on. But really I see no reason why musical notation wouldn’t be sufficient.
(I should note that’s not [s]; it’s [s͎] with an arrow below it. It’s hard to tell the difference with the font on my screen.)
(I should note that’s not [s]; it’s [s͎] with an arrow below it. It’s hard to tell the difference with the font on my screen.)