AlignedSpans converts between continuous time spans and discrete sample indices. Time spans describe a time intervals down to a resolution of 1 ns and are usually provided by TimeSpans.jl. Discrete sample indices are associated to signals sampled at some finite rate (e.g. Onda.jl's Samples objects).
AlignedSpans provides an AlignedSpan type which holds integer indices along with a sample rate. An AlignedSpan is thus an discrete index, but since it holds the sample rate, it can be used to represent a continuous time span as well, and it supports the TimeSpans.jl interface.
See the documentation for more.