This Is What LG Petrov Did During Clandestine.

During the recording of the Clandestine album, the vocalist LG Petrov has left/was kicked out of Entombed. He joined Entombed again before the recording of Wolverine Blues.
In his absence LG joined Comecon, a Death Metal band that used a drum computer. Comecon is very linked to Entombed. (See the band logo). After LG returned to Entombed, Comecon made two records with other singers. One of them was Martin van Drunen from Pestilence.

Comecon was a fairly minor band in the old Swedish scene, and if they were only semi-visible then, they've become invisible now. This is their best album, a borderline-classic with good songwriting, excellent production (which is a little cleaner than the standard for Sunlight), and enough unique and interesting touches to get your attention. Musically it's a midway point between classic Swedish death like Entombed or Dismember, and the early death/thrash of Pestilence (whose singer Martin Van Drunen is also the singer on this album - taking the place of LG Petrov). Tempos are generally mid or fast, no blast beats. Van Drunen's vocals are similar to what he did on Pestilence's "Consuming Impulse" - mid-pitched and hoarse.

The first Comecon album (Megatrends in Brutality) is also worth checking out, especially if you're an Entombed fan. But this is their high-water mark.
(From the web)

Comecon - Megatrends In Brutality (1992)

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