How many songs are in the album "Vol 4" by JazzTrax?

There are a total of 21 songs in "Vol 4".

When was the album "Vol 4" by JazzTrax released?

"Vol 4" was released on January 23, 2017.

#	Track	Artist	Key	Camelot	BPM
1	My Favourite Things - Backtrack	JazzTrax	E Minor	9A	188
2	Ain't Misbehavin' - Backtrack	JazzTrax	F Minor	4A	110
3	Ornithology - Backtrack	JazzTrax	F Minor	4A	110
4	April Joy - Backtrack	JazzTrax	F Minor	4A	110
5	Blue Moon - Backtrack	JazzTrax	F Minor	4A	110
6	Naima - Backtrack	JazzTrax	A♭ Major	4B	120
7	Joy Spring - Backtrack	JazzTrax	F Minor	4A	110
8	Lady Bird - Backtrack	JazzTrax	C Major	8B	98
9	Moon River - Backtrack	JazzTrax	F Minor	4A	110
10	Let's Cool One - Backtrack	JazzTrax	F Minor	4A	110
11	Paper Moon - Backtrack	JazzTrax	F Minor	4A	110
12	Time After Time - Backtrack	JazzTrax	F Major	7B	160
13	Memories Of You - Backtrack	JazzTrax	A♭ Major	4B	75
14	Misty - Backtrack	JazzTrax	A♭ Major	4B	75
15	All Of You - Backtrack	JazzTrax	F Minor	4A	110
16	Side By Side - Backtrack	JazzTrax	F Minor	4A	110
17	Michelle - Backtrack	JazzTrax	F Minor	4A	110
18	On The Sunny Side Of The Street - Backtrack	JazzTrax	F Major	7B	100
19	Just The Way You Are - Backtrack	JazzTrax	C Major	8B	180
20	So What - Backtrack	JazzTrax	A Minor	8A	130
21	The Duke - Backtrack	JazzTrax	F Minor	4A	110