Audio feeds to journalists in the tribunal's press box were cut during testimony from a female witness, to protect her identity.
Saddam Hussein, who for decades was one of the most feared leaders in the Middle East before being ousted by invading US-led troops in 2003, has said he is not afraid of the death penalty.
He is on trial along with seven co-defendants for the killings of 148 men and boys from Dujail in 1982, following an assassination attempt on the then-leader.
The eight face death by hanging if convicted over the alleged killings.
On Monday, the first day of evidence, the court heard chilling accounts of torture from witnesses punctuated by angry tirades from Saddam blasting the legality of the proceedings.
One witness said he witnessed incidents of murder and torture that included a meat grinder and electric shocks.
"I am not afraid of being executed" if found guilty, Saddam vowed, after an earlier outburst in which he shouted, "Long live Iraq."
Tuesday's session is expected to be dominated by testimony from further witnesses after Ahmed Mohammed Hassem al-Dujaili yesterday became the first to testify in person at the trial and be cross-examined just metres from Saddam.
A second witness, Jawad Abdul Aziz, recalled how Saddam's presidential guard "bombarded his village" before presiding judge Rizkar Mohammed Amin adjourned the first marathon session.
Iraq's newly empowered Shi'ite majority has heavily criticised the slow start of the trial, which is likely to be adjourned again ahead of landmark general elections on December 15.
Commentators have accused Saddam of trying to hijack the trial with his repeated tirades, mirrored by similarly theatrical interjections from his co-defendant and half-brother Barzan al-Tikriti, who is suffering from cancer.
US former attorney general Ramsey Clark, who is among those representing Saddam, has claimed it will be very difficult for his client to receive a fair trial and on yesterday criticised the proceedings as "chaotic".
"I think it's going to be very, very difficult," he told CNN, also questioning the impartiality of the presiding judge, a Kurd.
"If you don't have an impartial judge, why have a trial?" Mr Clark asked.
"You have to probe the prejudice. You have to find out if there is something in their background that makes it difficult for them to be fair."
Saddam is facing charges in this trial over the killing of Shi'ite villagers, but his regime also launched the bloody Anfal campaign against the Kurds, killing more than 180,000 people over the past two decades.
Mr Clark, who with other defence lawyers briefly walked out of proceedings on Monday, has also demanded better protection for the defence lawyers -- two of whom have already been murdered.
A second member of Saddam's defence team said the court set up under US occupation was forbidden by international law, and called for his client to be tried in an international tribunal.
Among the other defendants are Taha Yassin Ramadan, Saddam's former vice president, and Awad Ahmed al-Bandar, the head judge of the scrapped revolutionary court.
The process began with a brief opening on October 19, followed by a 40-day delay and a two-hour session on November 28 before a week-long adjournment.
The trial has been plagued by a range of problems since its inception, most notably serious security issues.
Iraqi security forces said on Sunday that they had foiled an insurgent group's plot to fire rockets at the court building.