Not much info about this one, just about the sounds recorded in this tape. The pong lang (Thai: โปงลาง) is a log xylophone from the Isan region of northeast Thailand.
The pong lang has 12 wooden bars that, with a strong rope, are tied together in a row at each end. The instrument can be played solo or in an ensemble. The pong lang is used for all kinds of occasions, especially for festivals and ceremonies.
You'll head also some electric organs wah guitar.
Take the download and enjoy it!