julia> using Signals

julia> ss = load("/Users/zcranko/Desktop/walt_djembe_126_02.wav")
Signals.Signal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz}  168002 fr (3.81 s)
[ ⣷⣶⣦⣶⣷⣦⣶⣦⣦⣶⣦⣶ ⣦⣄⣤⣤⣤⣤⣦⣄⡀ ⡀⣷⣷⣦⣶⣤⣶⣦⣦⣤⣀⣄⡀⣀⡀⣤⣶⣶⣶⣶⣷⣤⣶⣀⣦⣷⣤⣦⣤⣤⣄⣄⣦⣤⣷⣤⣄⡀⡀⣤⣷⣶⣶⣶⣦⣶⣄⣦⣄⣄⣄⣀⣀ ]
[ ⣷⣶⣦⣶⣷⣤⣶⣦⣦⣶⣤⣶⣀⣦⣤⣤⣤⣄⣤⣦⣄⣄⡀ ⣶⣶⣦⣶⣤⣶⣤⣦⣤⣄⣤ ⣄⣀⣤⣶⣦⣶⣦⣶⣦⣶⡀⣦⣷⣶⣦⣤⣦⣀⣄⣤⣤⣷⣦⣄ ⡀⣤⣶⣶⣶⣶⣦⣦⣄⣦⣄⣤⣄⣀⣄ ]


julia> ss[201:400]
Signals.Signal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz}    200 fr (4.51 ms)
[                                                  ⣀⣀⣀⣄⣦⣶⣶⣦⣦⣦⣤⣄⣄⣄⣄⣤⣦⣤ ⡀⣦⣦⣦⣄⣦⣶⣀⣶]
[                                                  ⣀⣀⣀⣄⣦⣶⣶⣦⣦⣦⣤⣄⣄⣄⣄⣤⣦⣤ ⡀⣦⣦⣦⣤⣦⣶⣄⣶]


julia> ss[1s:2s]
Signals.Signal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz}   44101 fr (1.00 s)
[ ⣶⣶⣷⣶⣦⣶⣶⣷⣶⣦⣶⣶⣶⣦⣤⣶⣶⣶⣷⣷⣶⣶⣶⣶⣶⣤⣦⣶⣶⣶⣄⣦⣦⣶⣦⣄⣷⣦⣷⣷⣶⣶⣶⣦⣦⣦⣶⣶⣦⣄⣤⣦⣦⣄⣤⣤⣤⣄⣄⣤⣤⣤⣤⣦⣶⣦⣦⣤⣤⣤⣤⣤⣶⣶⣤⣦⣦]
[ ⣦⣶⣷⣶⣤⣶⣶⣶⣶⣤⣶⣶⣶⣦⣤⣶⣶⣶⣷⣷⣦⣦⣶⣶⣦⣤⣦⣶⣶⣦⣄⣦⣦⣶⣦⣄⣷⣦⣷⣷⣦⣦⣶⣦⣦⣄⣶⣶⣦⡀⣄⣦⣦⣤⣤⣤⣤⣄ ⣄⣤⣤⣤⣦⣦⣶⣦ ⣄⣄⣤⣤⣶⣶⣄⣶⣦]


julia> demux(ss, 1,2, 1:2, [1,1,1,2])
(Signals.Signal{1,FixedPointNumbers.Fixed{Int32,31},44.1 kHz}  168002 fr (3.81 s)
[ ⣷⣶⣦⣶⣷⣦⣶⣦⣦⣶⣦⣶ ⣦⣄⣤⣤⣤⣤⣦⣄⡀ ⡀⣷⣷⣦⣶⣤⣶⣦⣦⣤⣀⣄⡀⣀⡀⣤⣶⣶⣶⣶⣷⣤⣶⣀⣦⣷⣤⣦⣤⣤⣄⣄⣦⣤⣷⣤⣄⡀⡀⣤⣷⣶⣶⣶⣦⣶⣄⣦⣄⣄⣄⣀⣀ ]
, Signals.Signal{1,FixedPointNumbers.Fixed{Int32,31},44.1 kHz}  168002 fr (3.81 s)
[ ⣷⣶⣦⣶⣷⣤⣶⣦⣦⣶⣤⣶⣀⣦⣤⣤⣤⣄⣤⣦⣄⣄⡀ ⣶⣶⣦⣶⣤⣶⣤⣦⣤⣄⣤ ⣄⣀⣤⣶⣦⣶⣦⣶⣦⣶⡀⣦⣷⣶⣦⣤⣦⣀⣄⣤⣤⣷⣦⣄ ⡀⣤⣶⣶⣶⣶⣦⣦⣄⣦⣄⣤⣄⣀⣄ ]
, Signals.Signal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz}  168002 fr (3.81 s)
[ ⣷⣶⣦⣶⣷⣦⣶⣦⣦⣶⣦⣶ ⣦⣄⣤⣤⣤⣤⣦⣄⡀ ⡀⣷⣷⣦⣶⣤⣶⣦⣦⣤⣀⣄⡀⣀⡀⣤⣶⣶⣶⣶⣷⣤⣶⣀⣦⣷⣤⣦⣤⣤⣄⣄⣦⣤⣷⣤⣄⡀⡀⣤⣷⣶⣶⣶⣦⣶⣄⣦⣄⣄⣄⣀⣀ ]
[ ⣷⣶⣦⣶⣷⣤⣶⣦⣦⣶⣤⣶⣀⣦⣤⣤⣤⣄⣤⣦⣄⣄⡀ ⣶⣶⣦⣶⣤⣶⣤⣦⣤⣄⣤ ⣄⣀⣤⣶⣦⣶⣦⣶⣦⣶⡀⣦⣷⣶⣦⣤⣦⣀⣄⣤⣤⣷⣦⣄ ⡀⣤⣶⣶⣶⣶⣦⣦⣄⣦⣄⣤⣄⣀⣄ ]
, Signals.Signal{4,FixedPointNumbers.Fixed{Int32,31},44.1 kHz}  168002 fr (3.81 s)
[ ⣷⣶⣦⣶⣷⣦⣶⣦⣦⣶⣦⣶ ⣦⣄⣤⣤⣤⣤⣦⣄⡀ ⡀⣷⣷⣦⣶⣤⣶⣦⣦⣤⣀⣄⡀⣀⡀⣤⣶⣶⣶⣶⣷⣤⣶⣀⣦⣷⣤⣦⣤⣤⣄⣄⣦⣤⣷⣤⣄⡀⡀⣤⣷⣶⣶⣶⣦⣶⣄⣦⣄⣄⣄⣀⣀ ]
[ ⣷⣶⣦⣶⣷⣦⣶⣦⣦⣶⣦⣶ ⣦⣄⣤⣤⣤⣤⣦⣄⡀ ⡀⣷⣷⣦⣶⣤⣶⣦⣦⣤⣀⣄⡀⣀⡀⣤⣶⣶⣶⣶⣷⣤⣶⣀⣦⣷⣤⣦⣤⣤⣄⣄⣦⣤⣷⣤⣄⡀⡀⣤⣷⣶⣶⣶⣦⣶⣄⣦⣄⣄⣄⣀⣀ ]
[ ⣷⣶⣦⣶⣷⣦⣶⣦⣦⣶⣦⣶ ⣦⣄⣤⣤⣤⣤⣦⣄⡀ ⡀⣷⣷⣦⣶⣤⣶⣦⣦⣤⣀⣄⡀⣀⡀⣤⣶⣶⣶⣶⣷⣤⣶⣀⣦⣷⣤⣦⣤⣤⣄⣄⣦⣤⣷⣤⣄⡀⡀⣤⣷⣶⣶⣶⣦⣶⣄⣦⣄⣄⣄⣀⣀ ]
[ ⣷⣶⣦⣶⣷⣤⣶⣦⣦⣶⣤⣶⣀⣦⣤⣤⣤⣄⣤⣦⣄⣄⡀ ⣶⣶⣦⣶⣤⣶⣤⣦⣤⣄⣤ ⣄⣀⣤⣶⣦⣶⣦⣶⣦⣶⡀⣦⣷⣶⣦⣤⣦⣀⣄⣤⣤⣷⣦⣄ ⡀⣤⣶⣶⣶⣶⣦⣦⣄⣦⣄⣤⣄⣀⣄ ]
)

julia> window(ss, 200ms, 1s)
Base.Generator{UnitRange{Int64},Signals.##20#21{Signals.Signal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz},Int64,Int64}}(Signals.#20, 1:15)

julia> (window(ss, 200ms, 1s) |> collect)[1:5]
5-element Array{Signals.SubSignal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz},1}:
 Signals.SubSignal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz} 44101 fr (1.00 s)
(0.00 s)                                                                (1.00 s)
[ ⣶⣶⣷⣶⣦⣶⣶⣷⣶⣦⣶⣶⣶⣦⣤⣶⣶⣶⣷⣷⣶⣶⣶⣶⣶⣤⣦⣶⣶⣶⣄⣦⣦⣶⣦⣄⣷⣦⣷⣷⣶⣶⣶⣦⣦⣦⣶⣶⣦⣄⣤⣦⣦⣄⣤⣤⣤⣄⣄⣤⣤⣤⣤⣦⣶⣦⣦⣤⣤⣤⣤⣤⣶⣶⣤⣦⣦]
[ ⣦⣶⣷⣶⣤⣶⣶⣶⣶⣤⣶⣶⣶⣦⣤⣶⣶⣶⣷⣷⣦⣦⣶⣶⣦⣤⣦⣶⣶⣦⣄⣦⣦⣶⣦⣄⣷⣦⣷⣷⣦⣦⣶⣦⣦⣄⣶⣶⣦⡀⣄⣦⣦⣤⣤⣤⣤⣄ ⣄⣤⣤⣤⣦⣦⣶⣦ ⣄⣄⣤⣤⣶⣶⣄⣶⣦]

 Signals.SubSignal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz} 44101 fr (1.00 s)
(200.02 ms)                                                             (1.20 s)
[⣦⣦⣶⣶⣷⣶⣦⣤⣶⣶⣶⣦⣤⣶⣶⣶⣦⣤⣦⣶⣦⣦⣷⣷⣷⡀⣷⣶⣦⣤⣦⣦⣦⣶⣦⣄⣤⣦⣦⣤⣄⣤⣤⣤⣀⣄⣤⣄⣤⣤⣦⣦⣦⣤⣄⣄⣤⣤⣤⣶⣦⣄⣤⣤⣤⣀⣄⣄ ⣄⣄⡀⣀⣄⡀  ⣶]
[⣦⣦⣶⣦⣷⣶⣶⣦⣶⣶⣶⣦⣄⣶⣶⣶⣤⣤⣦⣶⣦⣦⣷⣷⣷⣶⣶⣶⣶⣦⣦⣤⣶⣦⣦⣄⣀⣦⣦⣤ ⣤⣤⣤⣄⣀⣤⣀⣤⣄⣤⣦⣦⡀⡀⣀⣤⣤⣤⣶⣦⣦⣦⣦⣤⣄⣀⣄⣄⣄⣀⡀ ⡀ ⡀ ⣶]

 Signals.SubSignal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz} 44101 fr (1.00 s)
(400.05 ms)                                                             (1.40 s)
[⣶⣦⣤⣦⣦⣦⣶⣶⣷⣦⣶⣶⣦⣄⣦⣤⣄⣶⣦⣦⣤⣤⣤⣦⣤⣤⣤⣤⣤⣄⣀⣤⣄⣦⣤ ⣦⣦⣄⣄⣄⣤⣤⣤⣶⣦⣦⣦⣄⣤⣄⣤⣄⡀⣀⣄⡀⣄⣄⡀ ⣷⣷⣦⣷⣷⣷⣄⣶⣷⣷⣶⣤⣶⣶⣶⣶⣤]
[⣶⣦⣤⣦⣦⣦⣶⣶⣷⣤⣤⣶⣶⣦⣶⣤⣄⣦⣦⣦⣦⣀⣤⣦⣤⣤⣀⣤⣤⣤⣀⣄⣤⣦⣄⣤⣤⣦⣤⣄⣀⣄⣤⣤⣶⣦⣄⣦ ⣤⣤⣤⣄⣄⣀⣀⡀⡀⣀  ⣷⣷⣦⣷⣶⣶⣦⣦⣶⣷⣶⣄⣶⣶⣶⣦⣦]

 Signals.SubSignal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz} 44101 fr (1.00 s)
(600.07 ms)                                                             (1.60 s)
[⣤⣦⣦⣤⣦⣤⡀⣄⣦⣤⣦⣀⣤⣤⣤⣀⣄⣄⣦⣦⣤⣤⣦⣄⡀⣀⣤⣷⣶⣤⣶⣦⣤⣀⣤⣀⣤⣀ ⣀⣀⡀⣀⣀ ⡀⣶⣶⣶⣶⣶⣷⣶⣦⣷⣷⣶⣦⣦⣶⣶⣶⣦⣦⣶⣶⣶⣄⣦⣶⣶⣦⣀⣦⣦⣦⣤⣄]
[⣤⣦⣤⣤⣦⣦⣄⣄⣦⣦⣦⣄⣤⣤⣤⣄⡀⣀⣤⣦⣤⣤⣤⣄⣄⣄⣄⣷⣶⣤⣶⣦⣤⣄⣤⣄⣤⣄⣀⣀⣀⡀ ⡀ ⡀⣶⣶⣶⣶⣶⣶⣦⣦⣶⣷⣶⣤⣶⣶⣶⣶⣀⣦⣶⣶⣦⣄⣦⣶⣦⣤⣤⣦⣦⣦⣀⣤]

 Signals.SubSignal{2,FixedPointNumbers.Fixed{Int32,31},44.1 kHz} 44101 fr (1.00 s)
(800.09 ms)                                                             (1.80 s)
[⣄⣶⣤⣦⣦⣤⣤⣤⣄⣤⣄⣄⣤⣤⣦⣦⡀⣤⡀⣤⡀⣄⣀⣄ ⣀     ⣷⣷⣶⣷⣷⣷⣶⣦⣶⣷⣷⣶⣀⣶⣶⣶⣶⣄⣶⣶⣶⣦⣤⣶⣶⣦⣤⣤⣦⣦⣦⣀⣤⣦⣤⣤⣀⣤⣤⣄⣀⣀⣄⣄⣀ ⣀]
[⣤⣶⣀⣦⣦⣦⣀⣤⣄⣤⣤⡀⣤⣤⣦⣶⣦⣀⣄⣄⣄⣄⣀⣀⡀⣀ ⡀⡀  ⣷⣷⣶⣷⣶⣶⣶⣤⣦⣷⣶⣦⣦⣶⣶⣶⣦⣤⣶⣶⣦⣤⣦⣶⣶⣦⣀⣦⣦⣦⣤⣄⣦⣦⣤⣄⣄⣤⣤⣤⣀⣄⣤⣄⣄ ⣀]


julia> generate_sine(20s, 1Hz)
Signals.Signal{1,Float32,44.1 kHz}                           882001 fr (20.00 s)
[ ⣷⣦⣷⣶⣷⣶⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣶⣷⣶⣷⣦⣷⣤⣷⣦⣷⣶⣷⣶⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣶⣷⣶⣷⣦⣷⣤⣷⣦⣷⣶⣷⣶⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣷⣶⣷⣶⣷⣦⣷ ]